None
Conclusion:
concl,M,N:Formula List. q,r:Formula. a:Assignment. a |= <q::r::(M @ N), concl> a |= <M @ (qr::N), concl>
1. a |= <M @ (qr::N), concl>2. a |= <q::r::(M @ N), concl>
2. a |= <q::r::(M @ N), concl>