Multiple blue umbrella tables where people are eating.
There are umbrellas at the tables.
umbrella tables implies there are umbrellas at the tables.
exists p1 s1 x1 x2 x3.(a_topic(x1) & exists e1 x4.(Actor(e1,x4) & v_eat(e1) & n_people(x4)) & where(x1,p1) & n_table(x1) & of(x1,x3) & n_umbrella(x3) & a_blue(s1) & Theme(s1,x1) & (x1 = x2) & ne_nam_multiple(x2))
exists p1 x1 x3.(n_table(x3) & exists x2.((x1 = x2) & at(x2,x3) & n_umbrella(x2)))