premise: A fisherman using a cellphone on a boat.
hypothesis: A fisherman uses a cellphone.
explanation_1: using a cellphone is other form of  uses a cellphone
explanation_2: A fisherman is on a boat.
explanation_3: Using a cellphone on a boat is using a cellphone.
premise_logic: exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_use(e1) & on(x3,x4) & n_boat(x4) & n_cellphone(x3) & (x1 = x2) & n_fisherman(x1))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_cellphone(x2) & n_fisherman(x1))