sub:provenance {
  beldoc: dce:description "Approximately 61,000 statements." ;
    
dce:rights "Copyright (c) 2011-2012, Selventa. All rights reserved." ;
    
dce:title "BEL Framework Large Corpus Document" ;
    
pav:authoredBy sub:_5 ;
    
pav:version "20131211" . 
  
sub:_4 prov:value "several major growth factors, including epidermal growth factor, TGFalpha, TGFbeta, keratinocyte growth factor, IGF1, FGF, and PDGF, upregulate VEGF expression" ;
    
prov:wasQuotedFrom pubmed:15294883 . 
  
sub:_5 rdfs:label "Selventa" . 
  
sub:assertion prov:hadPrimarySource pubmed:15294883 ;
    
prov:wasDerivedFrom beldoc: , 
sub:_4 . 
}