People are clapping at the performers.
The people are booing.
Clapping is positive and booing is negative.
exists e1 x1 x2.(n_performer(x2) & at(e1,x2) & Actor(e1,x1) & v_clap(e1) & n_people(x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_boo(e1))