A dark-haired man in a striped shirt records a video of a gray-haired man using a MacBook laptop.
The dark-haired man does not know the man who is using a laptop.
Sentence 1 is missing man does not know the man
exists s1 x1.(all x2.(n_video(x2) -> exists e1 s2 s3 x3 x4 x5 x6 x7 x8.(a_topic(x1) & in(x1,x3) & of(x3,x5) & Theme(e1,x7) & Actor(e1,x6) & v_use(e1) & n_laptop(x7) & (x7 = x8) & ne_org_macbook(x8) & (x5 = x6) & n_man(x5) & a_gray-haired(s3) & Theme(s3,x5) & for(x3,x2) & n_record(x3) & of(x3,x4) & n_shirt(x4) & a_striped(s2) & Theme(s2,x3))) & n_man(x1) & a_dark-haired(s1) & Theme(s1,x1))
exists s1 x1 x2.(n_man(x2) & n_man(x1) & a_dark-haired(s1) & Theme(s1,x1) & -exists e2 e1 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_know(e2) & Theme(e1,x4) & Actor(e1,x3) & v_use(e1) & n_laptop(x4) & (x2 = x3)))