One African American man is looking through a microscope and there is a poster that says blood cells hanging on the wall.
There is a tall man in a labratory looking in a microscope.
Just because  One African American man is looking through a microscope and there is a poster that says blood cells hanging on the wall doesn't mean he is tall.
exists e1 p1 s1 s2 x1 x2 x3 x8.(n_wall(x8) & exists e2 e3 x4 x5 x6 x7.((x3 = x4) & for(e2,e3) & on(e3,x8) & Actor(e3,x5) & v_hang(e3) & Theme(e2,x6) & Actor(e2,x5) & v_say(e2) & n_cell(x6) & of(x6,x7) & n_blood(x7) & (x4 = x5) & n_poster(x4)) & through(e1,x2) & n_microscope(x2) & Actor(e1,x1) & v_look(e1) & n_man(x1) & a_american(s2) & Theme(s2,x1) & a_african(s1) & Theme(s1,x1) & card_eq_1(x1))
exists p1 x1 e1 s1 x2 x3 x4 x5.((x1 = x2) & in(e1,x5) & n_microscope(x5) & Actor(e1,x4) & v_look(e1) & (x2 = x4) & in(x2,x3) & n_labratory(x3) & n_man(x2) & a_tall(s1) & Theme(s1,x2))