A male with a beard is playing a guitar.
A man sings loudly, while playing the violin.
The man cannot play the guitar and the violin at the same time.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_guitar(x3) & with(x1,x2) & n_beard(x2) & n_male(x1))
exists e2 e1 s1 x1 x2.(n_violin(x2) & while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & a_loudly(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sing(e1) & n_man(x1))