It appears to be a makeshift boat floating down a river while a woman is singing.
A person is paddling in a wooden canoe.
Just because it is a makeshift boat does not mean it is a wooden canoe.
exists e1 p1 x1.(n_thing(x1) & Topic(e1,p1) & Actor(e1,x1) & v_appear(e1) & exists p2 e2 p3 s1 s2 x2 x3 x4.((x1 = x2) & exists e3 x5.(Actor(e3,x5) & v_sing(e3) & n_woman(x5)) & while(e2,p3) & a_down(s2) & Manner(e2,s2) & Theme(e2,x4) & Actor(e2,x3) & v_float(e2) & n_river(x4) & (x2 = x3) & n_boat(x2) & a_makeshift(s1) & Theme(s1,x2)))
exists e1 s1 x1 x2.(in(e1,x2) & n_canoe(x2) & a_wooden(s1) & Theme(s1,x2) & Actor(e1,x1) & v_paddle(e1) & n_person(x1))