Roleset embroil.01 Verbnet Class: NONE "involve in contention":

Roles:

Arg0:causer of contention, agent (rare)


Arg1:thing involved in contention


Arg2:contention

Examples:

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


normal usage (-)
A majority of an NIH-appointed panel recommended late last year that the research continue under carefully controlled conditions, but the issue became embroiled *trace* in politics as anti-abortion groups continued to oppose federal funding.
REL:	embroiled
Arg1:	*trace* -> the issue
Arg2-in:	politics
ArgM-TMP:	as anti-abortion groups continued to oppose federal funding

person: third tense: present aspect: perfect voice: active form: participle


agent, sorta (-)
The subsequent drive to reform Hong Kong's markets also has embroiled the interest-rate futures contract.
Arg0:	The subsequent drive to reform Hong Kong's markets
ArgM-DIS:	also
REL:	embroiled
Arg1:	the interest-rate futures contract

I feel there's some sort of unstated "in controversy" in the second example.