Two kids, a boy and a girl, playing with a toy train set on the floor.
Two children are indoors.
Indoors provides clarification to location of on the floor.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_floor(x9) & a_topic(x1) & rel(x1,x2) & subset_of(x4,x2) & with(e1,x6) & on(e2,x9) & Theme(e2,x8) & v_set(e2) & (x6 = x8) & n_train(x6) & of(x6,x7) & n_toy(x7) & Actor(e1,x5) & v_play(e1) & (x4 = x5) & n_girl(x4) & subset_of(x3,x2) & n_boy(x3) & n_kid(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.((x1 = x2) & n_indoor(x2)) & n_child(x1) & card_eq_2(x1))