premise: A child being watched while getting something out of a tank.
hypothesis: The tank has an opening.
explanation_1: A child getting something out of a tank means tank has an opening.
explanation_2: If they're getting something out of a tank, the tank has an opening.
explanation_3: The tank has been opened up by a child
premise_logic: exists e2 e1 x1 x2 x3.(while(e1,e2) & r_out(e2) & of(e2,x3) & n_tank(x3) & Theme(e2,x2) & Actor(e2,x1) & v_get(e2) & n_thing(x2) & Theme(e1,x1) & v_watch(e1) & n_child(x1))
hypothesis_logic: exists e1 x1 x2.(n_tank(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_opening(x2))