Surveying or installing underground items in a grassy field.
Items are being installed for a city project.
Just because items are being installed underground doesn't necessarily mean it is part of a city project.
(exists e1 s1 s2 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_survey(e1) & in(x2,x3) & n_field(x3) & a_grassy(s2) & Theme(s2,x3) & n_item(x2) & a_underground(s1) & Theme(s1,x2) & n_thing(x1)) | exists e2 s3 s4 x4 x5 x6.(Theme(e2,x5) & Actor(e2,x4) & v_install(e2) & in(x5,x6) & n_field(x6) & a_grassy(s4) & Theme(s4,x6) & n_item(x5) & a_underground(s3) & Theme(s3,x5) & n_thing(x4)))
exists e1 x1 x2 x3.(for(e1,x2) & n_project(x2) & of(x2,x3) & n_city(x3) & Theme(e1,x1) & v_install(e1) & n_item(x1))