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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_S000054990Member_lbl" xml:lang="en-US">LGM Risk Managed Total Return Fund</link:label>
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_ExtensionRiskMember_lbl" xml:lang="en-US">Extension Risk [Member]</link:label>
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_FundOfFundsRiskMember_lbl" xml:lang="en-US">Fund Of Funds Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_MortgagebackedSecuritiesRiskMember" xlink:label="nlfiv_MortgagebackedSecuritiesRiskMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_MortgagebackedSecuritiesRiskMember_lbl" xml:lang="en-US">Mortgagebacked Securities Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_USTreasuryRiskMember" xlink:label="nlfiv_USTreasuryRiskMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_USTreasuryRiskMember_lbl" xml:lang="en-US">U S Treasury Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateRiskMember" xlink:label="us-gaap_InterestRateRiskMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestRateRiskMember_lbl" xml:lang="en-US">Interest Rate Risk [Member]</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nlfiv_InverseFundRiskMember" xlink:to="nlfiv_InverseFundRiskMember_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_InverseFundRiskMember_lbl" xml:lang="en-US">Inverse Fund Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_LeverageRiskMember" xlink:label="nlfiv_LeverageRiskMember" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nlfiv_LeverageRiskMember" xlink:to="nlfiv_LeverageRiskMember_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_LeverageRiskMember_lbl" xml:lang="en-US">Leverage Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_ManagementRiskMember" xlink:label="nlfiv_ManagementRiskMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_ManagementRiskMember_lbl" xml:lang="en-US">Management Risk [Member]</link:label>
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_MarketRiskAndGeopoliticalRiskMember_lbl" xml:lang="en-US">Market Risk And Geopolitical Risk [Member]</link:label>
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_MoneyMarketFundRiskMember_lbl" xml:lang="en-US">Money Market Fund Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_PortfolioTurnoverRiskMember" xlink:label="nlfiv_PortfolioTurnoverRiskMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_PortfolioTurnoverRiskMember_lbl" xml:lang="en-US">Portfolio Turnover Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_C000172959Member" xlink:label="nlfiv_C000172959Member" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nlfiv_C000172959Member" xlink:to="nlfiv_C000172959Member_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_C000172959Member_lbl" xml:lang="en-US">LGM Risk Managed Total Return Fund Institutional Class</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_SAndP500IndexMember" xlink:label="nlfiv_SAndP500IndexMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_SAndP500IndexMember_lbl" xml:lang="en-US">S&amp;P 500 Index</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260923.xsd#nlfiv_BloombergGlobalAggregateIndexMember" xlink:label="nlfiv_BloombergGlobalAggregateIndexMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_BloombergGlobalAggregateIndexMember_lbl" xml:lang="en-US">Bloomberg Global Aggregate Index</link:label>
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