Roleset wrench.01 Verbnet Class: NONE "rotate violently so as to remove":

Roles:

Arg0:cause of rotation, remover


Arg1:thing removed


Arg2:from

Examples:

person: ns tense: present aspect: ns voice: passive form: participle


ambiguous PP (-)
State engineers have made a preliminary finding that it was failure of the concrete columns, wrenched [*] and separated [*] from the double-decker roadbed, that was responsible for the collapse.
REL:	wrenched
Arg1:	[*] -> the concrete columns

The ambiguity is in the attachment of the "from the roadbed"; does it go only with 'separate' or with the conjoined 'wrenched and separated'?