(TOP
  (S
    (NP-SBJ (NNP NCR) (NNP Corp.))
    (VP
      (VP
        (VBD unveiled)
        (NP
          (NP (CD two) (NNS models))
          (PP
            (IN of)
            (NP
              (NP (PRP$ its) (NNP Tower) (NN line))
              (PP (IN of) (NP (JJ midrange) (NNS computers)))))))
      (CC and)
      (VP
        (VBD introduced)
        (NP
          (NP (VBN advanced) (NN networking) (NN software))
          (SBAR
            (WHADVP-1 (-NONE- 0))
            (S
              (NP-SBJ (-NONE- *PRO*))
              (VP
                (TO to)
                (VP
                  (VB allow)
                  (S
                    (NP-SBJ (DT the) (NNP Tower) (NN family))
                    (VP
                      (TO to)