A boy walks down the sidewalk with a trash bag while two other boys follow him.
a boy burns a building
You cannot be walking down the sidewalk while burning a building simultaneously.
exists e1 p1 s1 x1 x2 x3 x4.(n_male(x2) & n_sidewalk(x2) & exists e2 x5.(Theme(e2,x2) & Actor(e2,x5) & v_follow(e2) & -(x5 = x1) & n_boy(x5) & card_eq_2(x5)) & n_boy(x1) & n_boy(x1) & while(e1,p1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & with(x2,x3) & n_bag(x3) & of(x3,x4) & n_trash(x4))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_burn(e1) & n_building(x2) & n_boy(x1))