The girls playfully pose for photos for each other in the park.
only boys were at the park
Girls are not boys
exists e1 s1 x1 x2 x3.(n_park(x3) & n_girl(x1) & in(e1,x3) & a_playfully(s1) & Manner(e1,s1) & all x4.(n_other(x4) -> (for(e1,x2) & for(x2,x4))) & n_photo(x2) & Actor(e1,x1) & v_pose(e1))
exists p1 x1 x3.(n_park(x3) & at(x1,x3) & all x2.(n_boy(x2) -> (x1 = x2)) & n_boy(x1))