A woman singing into a microphone and playing guitar at an event.
A woman mumbles into a microphone while playing a violin at an event
People cannot sing and mumble at the same time, and they cannot play the guitar and violin at the same time, because each instrument requires two hands.
exists e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & at(e1,x7) & n_event(x7) & into(e1,x3) & n_guitar(x5) & of(x5,x6) & n_playing(x6) & n_microphone(x4) & subset_of(x5,x3) & subset_of(x4,x3) & Actor(e1,x2) & v_sing(e1) & (x1 = x2) & n_woman(x1))
exists e2 e1 x1 x2 x3 x4.(while(e1,e2) & at(e2,x4) & n_event(x4) & Theme(e2,x3) & Actor(e2,x1) & v_play(e2) & n_violin(x3) & into(e1,x2) & n_microphone(x2) & Actor(e1,x1) & v_mumble(e1) & n_woman(x1))