Men with surveying equipment are in the background of landscape.
Men survey an area of land.
"An area of land" is another way of saying "landscape".
exists p1 s1 x1 x2 x3.(n_background(x3) & exists x4.(in(x1,x3) & of(x3,x4) & n_landscape(x4)) & with(x1,x2) & n_equipment(x2) & a_surveying(s1) & Theme(s1,x2) & n_man(x1))
all x1.(n_area(x1) -> exists x2 x3 x4.(a_topic(x2) & of(x2,x4) & n_land(x4) & for(x2,x1) & n_survey(x2) & of(x2,x3) & n_man(x3)))