A man is standing while playing the drums for an audience.
A man singing.
It cannot be inferred that the man is also singing while playing.
exists e1 e2 x1 x2 x3.(n_drum(x2) & while(e1,e2) & for(e2,x3) & n_audience(x3) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists x1 x2.(a_topic(x1) & n_singing(x1) & of(x1,x2) & n_man(x2))