A smiling young man in a brown shirt sitting up in the branches of a tree.
Nobody is sitting.
If nobody is sitting the young man would not be sitting.
exists e2 e1 s1 s2 s3 x1 x2 x3 x4 x5.(n_branch(x4) & a_topic(x1) & in(x1,x2) & in(e2,x4) & of(x4,x5) & n_tree(x5) & a_up(s3) & Manner(e2,s3) & Actor(e2,x3) & v_sit(e2) & (x2 = x3) & n_shirt(x2) & a_brown(s2) & Theme(s2,x2) & n_man(x1) & a_young(s1) & Theme(s1,x1) & Actor(e1,x1) & v_smile(e1))
-exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_person(x1))