Old guy, looking like Jerry Garcia, playing guitar on stage while others stand behind him.
The man is the lead singer in a Grateful Dead cover band.
Just because the man looks like Jerry Garcia and is playing guitar, it doesn't mean that he is the lead singer of Grateful Dead cover band.
exists e1 e2 p1 s1 s2 x1 x2 x3 x4 x5 x6.(n_male(x2) & n_person(x2) & ne_per_garcia(x2) & (x2 = x3) & ne_per_jerry(x3) & exists e3 x7.(behind(e3,x2) & Actor(e3,x7) & v_stand(e3) & -(x7 = x2) & n_person(x7)) & while(e2,p1) & on(e2,x6) & n_stage(x6) & Theme(e2,x5) & Actor(e2,x4) & v_play(e2) & n_guitar(x5) & n_guy(x4) & a_old(s2) & Theme(s2,x4) & like(e1,x2) & Actor(e1,x1) & v_look(e1) & n_guy(x1) & a_old(s1) & Theme(s1,x1))
exists p1 x1 x2 x3.(n_singer(x2) & of(x2,x3) & n_lead(x3) & n_man(x1) & exists s1 x4 x5 x6.((x1 = x2) & in(x2,x4) & n_band(x4) & of(x4,x6) & n_cover(x6) & of(x4,x5) & n_dead(x5) & a_grateful(s1) & Theme(s1,x4)))