Assertion: bowling ball's coverstock | /r/HasProperty | real key
Facets:
value: in getting a desirable ball reaction
type: PURPOSE
value: for any bowler
type: TRANSITIVE-OBJECT
Source sentences:
text: The coverstock is the real key for any bowler.
text: The core design and symmetry of a given ball are also points for consideration, but the coverstock is the real key in getting a desirable ball reaction.