Kids sit in the street at a market.
The kids are smart.
If one sits in the street, one is not smart at the same time.
exists e1 x1 x2 x3.(n_street(x2) & at(e1,x3) & n_market(x3) & in(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_kid(x1))
exists s1 x1.(n_kid(x1) & Theme(s1,x1) & a_smart(s1))