A bearded man is playing a musical instrument.
A bearded man knows how to play a musical instrument.
a bearded man is playing a musical instrument so he clearly knows how.
exists e1 s1 s2 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & a_musical(s2) & Theme(s2,x2) & n_man(x1) & a_bearded(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Topic(e1,x2) & Actor(e1,x1) & v_know(e1) & n_manner(x2) & exists e2 s2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_instrument(x4) & a_musical(s2) & Theme(s2,x4)) & n_man(x1) & a_bearded(s1) & Theme(s1,x1))