The tourists are out on the river in Italy, the man in the black and white striped shirt will tell them about the seine.
The tourists are in Venice while a man in a striped shirt tells them about the seine.
The tourists out on the river in Italy are not necessarily in Venice.
exists e1 p1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6.(n_seine(x5) & n_thing(x1) & n_shirt(x4) & a_striped(s4) & Theme(s4,x4) & a_white(s3) & Theme(s3,x4) & a_black(s2) & Theme(s2,x4) & n_man(x3) & ne_geo_italy(x2) & n_river(x6) & n_tourist(x1) & about(e1,x5) & Theme(e1,x1) & Actor(e1,x3) & v_tell(e1) & in(x3,x4) & in(p1,x2) & a_out(s1) & Manner(p1,s1) & on(x1,x6))
exists p1 p2 x1 x2 x5.(n_seine(x5) & n_thing(x1) & ne_geo_venice(x2) & n_tourist(x1) & exists e1 s1 x3 x4.(about(e1,x5) & Theme(e1,x1) & Actor(e1,x3) & v_tell(e1) & in(x3,x4) & n_shirt(x4) & a_striped(s1) & Theme(s1,x4) & n_man(x3)) & while(p1,p2) & in(x1,x2))