Man and child riding in go-cart.
A man teaching his son how to tie knots for a merit badge.
They cannot be riding in a go-cart and tie-ing knots simultaneously
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x4) & n_go-cart(x4) & n_riding(x1) & of(x1,x3) & n_child(x3) & of(x1,x2) & n_man(x2))
exists e1 p1 x1 x2 x3.(a_topic(x1) & Topic(x1,p1) & exists e2 x4 x5 x6.(for(e2,x5) & n_badge(x5) & of(x5,x6) & n_merit(x6) & Theme(e2,x4) & Actor(e2,x1) & v_tie(e2) & n_knot(x4)) & Theme(e1,x3) & Actor(e1,x2) & v_teach(e1) & n_son(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_man(x1))