A man is singing and playing a guitar.
A man entertains a crowd of people
A man can sing and play guitar in many scenarios.  It doesn't mean he entertains a crowd of people.
exists e2 e1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_guitar(x4) & n_man(x3) & Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_guitar(x2) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_entertain(e1) & of(x2,x3) & n_people(x3) & n_crowd(x2) & n_man(x1))