A man is singing with a microphone on the sidewalk
The man is singing in the theater.
A man is either singing with a microphone on a sidewalk or in a theater.
exists e1 x1 x2 x3.(n_sidewalk(x3) & with(e1,x2) & on(x2,x3) & n_microphone(x2) & Actor(e1,x1) & v_sing(e1) & n_man(x1))
exists e1 x1 x2.(n_theater(x2) & n_man(x1) & in(e1,x2) & Actor(e1,x1) & v_sing(e1))