A man in black pants and shirt is holding a guitar and standing next to a microphone in front of a pink background.
A man is standing up.
In sentence 1 the man is only described as standing, he could be  leaning against something while standing. This would not necessarily be described as standing up.
exists e1 e2 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14.(in(e2,x13) & of(x13,x14) & n_background(x14) & a_pink(s4) & Theme(s4,x14) & n_front(x13) & to(e2,x12) & n_microphone(x12) & r_next(e2) & Actor(e2,x8) & v_stand(e2) & in(x8,x9) & n_shirt(x11) & n_pants(x10) & subset_of(x11,x9) & subset_of(x10,x9) & a_black(s3) & Theme(s3,x9) & n_man(x8) & in(e1,x6) & of(x6,x7) & n_background(x7) & a_pink(s2) & Theme(s2,x7) & n_front(x6) & Theme(e1,x5) & Actor(e1,x1) & v_hold(e1) & n_guitar(x5) & in(x1,x2) & n_shirt(x4) & n_pants(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_black(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1.(a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))