A man and a boy ride a go-cart
Go-cart breakdown.
If the go-cart is having a breakdown, it would be impossible to ride it.
exists s1 x1.(a_topic(s1) & all x2.(n_go-cart(x2) -> exists x3 x4.(subset_of(x3,s1) & for(x3,x2) & n_ride(x3) & of(x3,x4) & n_boy(x4))) & subset_of(x1,s1) & n_man(x1))
exists s1 s2 x1.(n_breakdown(x1) & a_.(s2) & Theme(s2,x1) & a_go-cart(s1) & Theme(s1,x1) & a_topic(x1))