A man with a red helmet kayaking.
There is a man wearing a helmet riding a bike.
kayaking is different from riding a bicycle
exists s1 x1 x2 x3.(a_topic(x1) & with(x1,x2) & n_kayaking(x2) & of(x2,x3) & n_helmet(x3) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1 e1 e2 x2 x3 x4 x5 x6.((x1 = x2) & Theme(e2,x4) & Actor(e2,x3) & v_wear(e2) & Theme(e1,x6) & Actor(e1,x5) & v_ride(e1) & n_bike(x6) & (x4 = x5) & n_helmet(x4) & (x2 = x3) & n_man(x2))