Some teenagers smile from an outdoor table.
Some teenagers were fighting outside.
If the teenagers are smiling from an outdoor table, then they were probably not fighting outside.
exists e1 s1 x1 x2.(from(e1,x2) & n_table(x2) & a_outdoor(s1) & Theme(s1,x2) & Actor(e1,x1) & v_smile(e1) & n_teenager(x1))
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_outside(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_fight(e1) & n_teenager(x1))