A young man reads a book in bed.
The young man reads before going to sleep.
Reading in bed does not necessarily imply it being before going to sleep.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & in(x2,x3) & n_bed(x3) & n_book(x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 e2 p1 s1 x1.(n_man(x1) & a_young(s1) & Theme(s1,x1) & before(e1,e2) & Topic(e2,p1) & Actor(e2,x1) & v_go(e2) & exists e3.(Actor(e3,x1) & v_sleep(e3)) & Actor(e1,x1) & v_read(e1))