A man in a wetsuit is suspended from a para-surfing harness whilst moving across the water on a board.
The man is teaching others how to para-surf.
In the first sentence is gives no indication that he is teaching other people how to para surf.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_water(x6) & from(e1,x3) & on(e2,x7) & n_board(x7) & across(e2,x6) & Actor(e2,x5) & v_move(e2) & (x3 = x5) & n_whilst(x3) & of(x3,x4) & n_harness(x4) & a_para-surfing(s1) & Theme(s1,x3) & Theme(e1,x1) & v_suspend(e1) & in(x1,x2) & n_wetsuit(x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_man(x1) & to(e1,x3) & n_para-surf(x3) & a_how(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & -(x2 = x3) & n_person(x3) & n_person(x2))