This/DT is/VBZ just/RB a/DT test/NN ./.

(ROOT
  (S
    (NP (DT This))
    (VP (VBZ is) (RB just)
      (NP (DT a) (NN test)))
    (. .)))

nsubj(test-5, This-1)
cop(test-5, is-2)
advmod(test-5, just-3)
det(test-5, a-4)