Assertion: lang racket | /r/HasProperty | define
Facets:
Source sentences:
text: #lang racket ( define ( extract str ) ( substring str 4 7 ) )
text: #lang racket ( define ( extract str ) ( substring str 4 7 ) ) ( extract "the cat out of the bag" )
text: #lang racket ( define ( sum .
text: #lang racket ( define ( fold-left