A young man holding a green balloon shaped like a star in front of a large stone building.
A young man holds a balloon in the basement of a building.
The first sentence just says in front for a large stone building basically saying outside. Never states it's in the basement of the building.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(like(e2,x4) & in(x4,x5) & of(x5,x6) & n_building(x6) & of(x6,x7) & n_stone(x7) & a_large(s3) & Theme(s3,x6) & n_front(x5) & n_star(x4) & Actor(e2,x1) & v_shape(e2) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_balloon(x3) & a_green(s2) & Theme(s2,x3) & (x1 = x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(n_basement(x3) & in(e1,x3) & of(x3,x4) & n_building(x4) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_balloon(x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))