A group of people pulling and falling on each other on the ground, with their shirts off.
The people are sitting and smiling.
people that are falling can not be sitting.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(n_shirt(x6) & of(x6,x5) & n_thing(x5) & n_ground(x5) & a_topic(x1) & a_off(s1) & Manner(e2,s1) & with(e2,x6) & on(e2,x5) & all x7.(n_other(x7) -> on(e2,x7)) & Actor(e2,x4) & v_fall(e2) & (x1 = x4) & Actor(e1,x3) & v_pull(e1) & (x1 = x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e2 e1 x1.(n_people(x1) & Actor(e2,x1) & v_smile(e2) & Actor(e1,x1) & v_sit(e1))