Two kids laughing from a long day of school.
Kids laughing about their classmates.
Kids laughing are not necessarily laughing about their classmates.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & from(e1,x3) & of(x3,x4) & n_school(x4) & n_day(x3) & a_long(s1) & Theme(s1,x3) & Actor(e1,x2) & v_laugh(e1) & (x1 = x2) & n_kid(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & about(e1,x3) & n_classmate(x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x2) & v_laugh(e1) & (x1 = x2) & n_kid(x1))