Families are gathered together near a road through the park.
The road through the park is empty.
The road would not be empty if families are gathered together near it.
exists e1 s1 x1 x2 x3.(n_park(x3) & through(e1,x3) & near(e1,x2) & n_road(x2) & a_together(s1) & Manner(e1,s1) & Theme(e1,x1) & v_gather(e1) & n_family(x1))
exists s1 x1 x2.(n_park(x2) & n_road(x1) & Theme(s1,x1) & a_empty(s1) & through(x1,x2))