Three children assemble their sailboat to take a sail on the lake.
Three people are building something.
Three people are building something implies three children assemble their sailboat
exists e1 p1 x1 x2 x3 x5.(n_lake(x5) & Topic(e1,p1) & exists e2 x4.(on(e2,x5) & Theme(e2,x4) & Actor(e2,x1) & v_take(e2) & n_sail(x4)) & Theme(e1,x3) & Actor(e1,x2) & v_assemble(e1) & n_sailboat(x3) & of(x3,x1) & n_thing(x1) & n_child(x2) & card_eq_3(x2) & n_child(x1) & card_eq_3(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_thing(x2) & n_people(x1) & card_eq_3(x1))