A man is going down a river in a kayak.
A man is kayaking down the river with friends
The man in the kayak may be not be with friends or anyone else at all.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_kayak(x3) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_river(x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_river(x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_kayake(e1) & with(x2,x3) & n_friend(x3) & n_man(x1))