It appears to be a makeshift boat floating down a river while a woman is singing.
There are women at the riverbank watching some makeshift boat racing contest
It is not implied that there are women on the shore of the riverbank. It is not implied that the makeshift boat is in a racing contest.
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 p1 s1 x1 x2 x3 x4 x5.(n_riverbank(x2) & for(p1,e1) & Theme(e1,x3) & Actor(e1,x1) & v_watch(e1) & n_contest(x3) & of(x3,x5) & n_racing(x5) & of(x3,x4) & n_boat(x4) & a_makeshift(s1) & Theme(s1,x3) & at(p1,x2) & exists x6.((x1 = x6) & n_woman(x6)))