People are pouring cement for the work.
A human pouring
In a both  sentence people are pouring.
exists e1 x1 x2 x3.(n_work(x3) & for(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_pour(e1) & n_cement(x2) & n_people(x1))
exists s1 x1.(a_topic(x1) & n_pour(x1) & a_human(s1) & Theme(s1,x1))