A dog on a leash walks on the sidewalk while another dog follows.
Dogs are playing fetch at the beach.
Dogs walking on the sidewalk are not in the same location or doing the same activity as dogs playing fetch at the beach.
exists e1 p1 x1 x2 x3.(n_sidewalk(x3) & exists e2 x4.(Actor(e2,x4) & v_follow(e2) & n_dog(x4) & -(x4 = x1)) & n_dog(x1) & n_dog(x1) & while(e1,p1) & on(e1,x3) & Actor(e1,x1) & v_walk(e1) & on(x1,x2) & n_leash(x2))
exists e1 s1 x1 x2.(n_beach(x2) & at(e1,x2) & a_fetch(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & n_dog(x1))