A group of six children with one instructor pointing which way to paddle while white river rafting in a raft.
A man is teaching a small group of adults about raft safety.
The group cannot both be children and adults.
(x)
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & of(x2,x3) & about(x3,x4) & n_safety(x4) & of(x4,x5) & n_raft(x5) & n_adult(x3) & n_group(x2) & a_small(s1) & Theme(s1,x2) & n_man(x1))