A man and two children, one child sitting on a pillow, staring out at an aquarium full of tropical fish.
The fish were lobsters.
Lobsters are not tropical fish.
exists e1 e2 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(s1) & rel(s1,x3) & for(e1,e2) & a_out(s4) & Manner(e2,s4) & at(e2,x6) & of(s2,x8) & n_fish(x8) & a_tropical(s3) & Theme(s3,x8) & Theme(s2,x7) & a_full(s2) & (x6 = x7) & n_aquarium(x6) & Actor(e2,x4) & v_stare(e2) & on(e1,x5) & n_pillow(x5) & Actor(e1,x4) & v_sit(e1) & (x3 = x4) & n_child(x3) & card_eq_1(x3) & subset_of(x2,s1) & n_child(x2) & card_eq_2(x2) & subset_of(x1,s1) & n_man(x1))
exists p1 x1.(n_fish(x1) & exists x2.((x1 = x2) & n_lobster(x2)))