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<?xml version="1.0" encoding="windows-1252"?> |
<!-- Generated by DFIN XBRL Instance Document - http://www.dfinsolutions.com/ - Version R3.0 - on 19-March-2024 [09:51:33] {PM} --> |
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"> |
| <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" roleURI="http://www.xbrl.org/2009/role/negatedLabel"/> |
| <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel"/> |
| <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel"/> |
| <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel"/> |
| <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" roleURI="http://www.xbrl.org/2009/role/negatedNetLabel"/> |
| <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel"/> |
| <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" roleURI="http://www.xbrl.org/2009/role/netLabel"/> |
| <labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link"> |
| | <loc xlink:type="locator" xlink:href="cik0001216583-20240319.xsd#cik0001216583_CommonSharesMember" xlink:label="loc_cik0001216583_CommonSharesMember"/> |
| | <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001216583_CommonSharesMember" xml:lang="en-US"> Common Shares [Member] </label> |
| | <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001216583_CommonSharesMember" xlink:to="lab_cik0001216583_CommonSharesMember"/> |
| | <loc xlink:type="locator" xlink:href="cik0001216583-20240319.xsd#cik0001216583_PreferredSharesMember" xlink:label="loc_cik0001216583_PreferredSharesMember"/> |
| | <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001216583_PreferredSharesMember" xml:lang="en-US"> Preferred Shares [Member] </label> |
| | <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001216583_PreferredSharesMember" xlink:to="lab_cik0001216583_PreferredSharesMember"/> |
| | <loc xlink:type="locator" xlink:href="cik0001216583-20240319.xsd#cik0001216583_TfpSeriesAMember" xlink:label="loc_cik0001216583_TfpSeriesAMember"/> |
| | <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001216583_TfpSeriesAMember" xml:lang="en-US"> TFP Series A [Member] </label> |
| | <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001216583_TfpSeriesAMember" xlink:to="lab_cik0001216583_TfpSeriesAMember"/> |
| | <loc xlink:type="locator" xlink:href="cik0001216583-20240319.xsd#cik0001216583_TfpSeriesBMember" xlink:label="loc_cik0001216583_TfpSeriesBMember"/> |
| | <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001216583_TfpSeriesBMember" xml:lang="en-US"> TFP Series B [Member] </label> |
| | <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001216583_TfpSeriesBMember" xlink:to="lab_cik0001216583_TfpSeriesBMember"/> |
| | </labelLink> |
| </linkbase> |