handle conjunctions

[jeisner]

[item from the old TO-DO file dated 2002-04-07]

Conjunctions. (Try to do this automatically using prior distrib over frames? I.e., want both conjuncts to produce a likely frame. Also want the conjuncts to be like each other, so maybe want the frames to be related by few edit ops.)

Even if we don't do conjunctions, keep the non-conjunction frames from sentences with conjunctions! Similarly for buggy rules.