premise: A man speaking or singing into a microphone while playing the piano.
hypothesis: A man is giving a piano lesson.
explanation_1: The man is not necessarily giving a lesson.
explanation_2: Singing and playing the piano does not necessarily mean he is teaching a lesson.
explanation_3: Not all piano players will give a piano lesson.
premise_logic: exists x5.(n_piano(x5) & (exists x1 x2.(a_topic(x1) & n_speaking(x1) & of(x1,x2) & n_man(x2)) | exists e1 e2 x3 x4.(while(e1,e2) & Theme(e2,x5) & Actor(e2,x3) & v_play(e2) & a_topic(e1) & into(e1,x4) & n_microphone(x4) & Actor(e1,x3) & v_sing(e1) & n_thing(x3))))
hypothesis_logic: exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_lesson(x2) & of(x2,x3) & n_piano(x3) & n_man(x1))