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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_IndustrialSectorRiskMember_lbl" xml:lang="en-US">Industrial Sector 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_ShortSalesRiskMember_lbl" xml:lang="en-US">Short Sales Risk [Member]</link:label>
      <link:loc xlink:type="locator" xlink:href="nlfiv-20260723.xsd#nlfiv_SmallAndMediumCapitalizationCompaniesRiskMember" xlink:label="nlfiv_SmallAndMediumCapitalizationCompaniesRiskMember" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_SmallAndMediumCapitalizationCompaniesRiskMember_lbl" xml:lang="en-US">Small And Medium Capitalization Companies 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_StockMarketRiskMember_lbl" xml:lang="en-US">Stock Market 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_C000223275Member_lbl" xml:lang="en-US">USA Mutuals Vice Fund Institutional Class</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nlfiv_C000223276Member" xlink:to="nlfiv_C000223276Member_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_C000223276Member_lbl" xml:lang="en-US">USA Mutuals Vice Fund Investor Class</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nlfiv_C000223277Member" xlink:to="nlfiv_C000223277Member_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_C000223277Member_lbl" xml:lang="en-US">USA Mutuals Vice Fund Class C</link:label>
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nlfiv_C000223272Member_lbl" xml:lang="en-US">USA Mutuals All Seasons Fund Institutional Class</link:label>
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