(IP 
  (NP-SBJ 
    (NN 会谈))
                    
  (VP 
    (VC 是)
                    
    (NP-PRD 
      (CP 
        (WHNP-2 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (-NONE- *T*-2))
                    
            (VP 
              (PP-LOC 
                (P 在)
                    
                (LCP 
                  (NP 
                    (CP 
                      (WHNP-1 
                        (-NONE- *OP*))
                    
                      (IP 
                        (NP-SBJ 
                          (-NONE- *T*-1))
                    
                        (VP 
                          (VCD 
                            (VA 亲切)
                    
                            (VA 友好))))
                    
                      (DEC 的))
                    
                    (NP 
                      (NN 气氛)))
                    
                  (LC 中)))
                    
              (VV 进行)))
                    
          (DEC 的))))))
arg0: 
                    *T*-1