On a sidewalk, tall man in a black shirt and a police officer with their backs to the viewer walk past a man in a white t-shirt, black shorts, and sandals.
A policeman is investigating an incident
The policeman's presence could be explained by some activity other than investigating, and the police officer may be present even if there has been no incident.
exists s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15.(n_walk(x10) & of(x10,x11) & n_viewer(x11) & on(x1,x2) & rel(x2,x3) & subset_of(x6,x3) & with(x6,x8) & subset_of(x15,x8) & n_sandal(x15) & subset_of(x9,x8) & to(x9,x10) & past(x10,x12) & in(x12,x13) & rel(x13,x14) & n_shorts(x14) & a_black(s4) & Theme(s4,x14) & n_t-shirt(x13) & a_white(s3) & Theme(s3,x13) & n_man(x12) & n_back(x9) & of(x9,x1) & n_thing(x1) & n_officer(x6) & of(x6,x7) & n_police(x7) & subset_of(x4,x3) & in(x4,x5) & n_shirt(x5) & a_black(s2) & Theme(s2,x5) & n_man(x4) & a_tall(s1) & Theme(s1,x4) & n_sidewalk(x2) & n_event(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_investigate(e1) & n_incident(x2) & n_policeman(x1))