A man and woman look back at the camera while standing in front of a red art structure.
The man and woman are at an art exhibit.
A man and a woman standing in front of  red art structure, while they look back at the camera, aren't necessarily at an art exhibit.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7.(n_camera(x4) & while(e1,e2) & in(e2,x5) & of(x5,x6) & n_structure(x6) & of(x6,x7) & n_art(x7) & a_red(s2) & Theme(s2,x6) & n_front(x5) & Actor(e2,x1) & v_stand(e2) & a_back(s1) & Manner(e1,s1) & at(e1,x4) & Actor(e1,x1) & v_look(e1) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists p1 x1 x2 x3.(n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & exists x4 x5.(at(x1,x4) & n_exhibit(x4) & of(x4,x5) & n_art(x5)))