(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (VP 
      (VV 惊悉)
                    
      (IP-OBJ 
        (NP-PN-SBJ 
          (NR 理查德·尼克松)
                    
          (NN 先生))
                    
        (VP 
          (ADVP 
            (AD 不幸))
                    
          (VP 
            (VV 病逝)))))
                    
    (PU ，)
                    
    (VP 
      (ADVP 
        (AD 谨))
                    
      (VP 
        (VV 表示)
                    
        (NP-OBJ 
          (CP 
            (WHNP-1 
              (-NONE- *OP*))
                    
            (CP 
              (IP 
                (NP-SBJ 
                  (-NONE- *T*-1))
                    
                (VP 
                  (VA 深切)))
                    
              (DEC 的)))
                    
          (NP 
            (NN 哀悼)))))))
arg0: 
                    *T*-1