A man playing a guitar while standing in front of a microphone singing.
A man is performing at a talent competition.
Playing a guitar and singing does not necessarily mean at a talent competition.
exists e1 e2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & while(e1,e2) & in(e2,x4) & of(x4,x5) & n_singing(x5) & of(x5,x6) & n_microphone(x6) & n_front(x4) & Actor(e2,x2) & v_stand(e2) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(at(e1,x2) & n_competition(x2) & of(x2,x3) & n_talent(x3) & Actor(e1,x1) & v_perform(e1) & n_man(x1))