People use tools while working in a field.
people and dogs are deep ocean swimming
People working in a field aren't deep ocean swimming
exists e1 e2 x1 x2 x3.(while(e1,e2) & in(e2,x3) & n_field(x3) & Actor(e2,x1) & v_work(e2) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_tool(x2) & n_people(x1))
exists p1 x1 x2 x3.(exists s1 x4 x5.((x1 = x4) & n_swimming(x4) & of(x4,x5) & n_ocean(x5) & a_deep(s1) & Theme(s1,x4)) & n_dog(x3) & n_people(x2) & subset_of(x3,x1) & subset_of(x2,x1))