A man playing a guitar while standing in front of a microphone singing.
There is a man wearing cowboy boots playing an acoustic guitar and singing.
The guitar is not necessarily acoustic and he is not necessarily wearing cowboy boots.
exists e1 e2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & while(e1,e2) & in(e2,x4) & of(x4,x5) & n_singing(x5) & of(x5,x6) & n_microphone(x6) & n_front(x4) & Actor(e2,x2) & v_stand(e2) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_man(x1))
exists p1 x1 e1 e2 s1 s2 x2 x3 x4 x5 x6 x7 x8.((x1 = x2) & Theme(e2,x4) & Actor(e2,x3) & v_wear(e2) & Theme(e1,x6) & Actor(e1,x5) & v_play(e1) & n_singing(x8) & n_guitar(x7) & subset_of(x8,x6) & subset_of(x7,x6) & a_acoustic(s2) & Theme(s2,x6) & (x4 = x5) & n_boot(x4) & a_cowboy(s1) & Theme(s1,x4) & (x2 = x3) & n_man(x2))