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<http://webisa.webdatacommons.org/165084352>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<heatingcentral.com> .
<http://webisa.webdatacommons.org/prov/453968903>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/165084352> .
<http://webisa.webdatacommons.org/prov/57315025>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/165084352> .
<http://webisa.webdatacommons.org/165084352>	<http://www.w3.org/ns/prov#value>	"It is possible for plumbers to be exposed to chemicals such as asbestos or lead." .