A young man in a t-shirt smiling in a bookstore.
Someone was smiling while they were in a bookstore.
A young man is someone.
exists s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x2) & in(x2,x3) & n_bookstore(x3) & n_smiling(x2) & a_t-shirt(s2) & Theme(s2,x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 p1 x1.(exists p2 x2.(in(x1,x2) & n_bookstore(x2)) & n_thing(x1) & while(e1,p1) & Actor(e1,x1) & v_smile(e1) & n_person(x1))