A crowd is sitting on a porch outside.
they play tennis now
One cannot be sitting on a porch and play tennis simultaneously.
exists e1 x1 x2 x3.(on(e1,x2) & n_outside(x2) & of(x2,x3) & n_porch(x3) & Actor(e1,x1) & v_sit(e1) & n_crowd(x1))
exists e1 s1 x1 x2.(n_thing(x1) & a_now(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tennis(x2))