( 
  (IP 
    (NP-SBJ 
      (PN 我))
                    
    (VP 
      (VV 认为)
                    
      (IP-OBJ 
        (NP-SBJ 
          (DP 
            (DT 这)
                    
            (QP 
              (CD 两)))
                    
          (NP 
            (NN 者)))
                    
        (VP 
          (VC 是)
                    
          (NP-PRD 
            (CP 
              (WHNP-1 
                (-NONE- *OP*))
                    
              (CP 
                (IP 
                  (NP-SBJ 
                    (-NONE- *T*-1))
                    
                  (VP 
                    (VA 并行不悖)))
                    
                (DEC 的)))))))))
arg0:  (*T*-1)->(这两者)