A group of kids with an adult in the background coaching them while they are pulling on a green rope.
the group of kids are being coached by an adult
If an adult is coaching a group of kids than it's reasonable to say that the children are being coached.
exists e1 p1 x1 x2 x3 x4 x5.(n_thing(x4) & n_thing(x4) & n_background(x4) & a_topic(x1) & exists e2 s1 x6.(on(e2,x6) & n_rope(x6) & a_green(s1) & Theme(s1,x6) & Actor(e2,x4) & v_pull(e2)) & while(e1,p1) & Theme(e1,x4) & Actor(e1,x5) & v_coach(e1) & (x1 = x5) & of(x1,x2) & with(x2,x3) & in(x3,x4) & n_adult(x3) & n_kid(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_group(x1) & Actor(e1,x3) & n_adult(x3) & Theme(e1,x1) & v_coach(e1) & of(x1,x2) & n_kid(x2))