(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP 
      (AD 谨))
                    
    (PP-DIR 
      (P 向)
                    
      (NP 
        (DNP 
          (NP-PN 
            (NR 尼克松)
                    
            (NN 先生))
                    
          (DEG 的))
                    
        (NP 
          (NN 家属))))
                    
    (VP 
      (VV 致以)
                    
      (NP-OBJ 
        (CP 
          (WHNP-1 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-1))
                    
              (VP 
                (VA 亲切)))
                    
            (DEC 的)))
                    
        (NP 
          (NN 慰问))))))
arg0: 
                    *pro* 
                
arg1: 
                    *OP* *T*-1 亲切 的 慰问 
                
arg2: 
                    向 尼克松 先生 的 家属 
                
argm: 
                    谨