Four children looking through rolled up booklets.
Four children reading books for school
Sentence 1 says they are looking through books not reading them. They could be just looking at pictures and never stated it was for school.
exists e1 e2 s1 x1 x2.(through(e1,x2) & n_booklet(x2) & a_up(s1) & Theme(s1,x2) & Theme(e2,x2) & v_roll(e2) & Actor(e1,x1) & v_look(e1) & n_child(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & for(e1,x4) & n_school(x4) & Theme(e1,x3) & Actor(e1,x2) & v_read(e1) & n_book(x3) & (x1 = x2) & n_child(x1) & card_eq_4(x1))