A young lady playing guitar on a stage in a park.
A musician is playing a violin on a stage in a park, and is the only musician.
The only musician playing a violin contradicts with the young lady who is playing a guitar in sentence 1.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x5) & n_park(x5) & on(e1,x4) & n_stage(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_lady(x1) & a_young(s1) & Theme(s1,x1))
exists e1 p1 x1 x2 x3 x4 x5.((x5 = x1) & all x6.(n_musician(x6) -> (x1 = x6)) & n_musician(x1) & n_musician(x1) & n_musician(x5) & in(e1,x4) & n_park(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & on(x2,x3) & n_stage(x3) & n_violin(x2))