Assertion: contractor's project | /r/CapableOf | involve extending existing foundation
Facets:
Source sentences:
text: Among the subs that may be needed for a residential project that involves extending an existing foundation are a surveyor, earth-moving sub­contractor for excavation and site preparation, and foundation contractor for the footings and cellar walls (though another sub, a mason, may be hired to build the walls if they are to be of block).