(IP 
  (IP-SBJ 
    (NP-PN-SBJ 
      (NR 泰森))
                    
    (VP 
      (ADVP 
        (AD 之所以))
                    
      (VP 
        (VV 选中)
                    
        (NP-OBJ 
          (PN 他)))))
                    
  (PU ，)
                    
  (VP 
    (ADVP 
      (AD 也))
                    
    (VP 
      (VC 是)
                    
      (PP-PRD 
        (P 因为)
                    
        (NP 
          (CP-APP 
            (IP 
              (NP-TPC 
                (DP 
                  (DT 此))
                    
                (NP 
                  (NN 君)))
                    
              (IP 
                (IP 
                  (NP-SBJ 
                    (NN 拳头))
                    
                  (VP 
                    (VA 软)))
                    
                (PU ，)
                    
                (IP 
                  (NP-SBJ 
                    (NN 肉))
                    
                  (VP 
                    (ADVP 
                      (AD 也))
                    
                    (ADVP 
                      (AD 不))
                    
                    (VP 
                      (VA 硬))))))
                    
            (DEC 的))
                    
          (NP 
            (NN 缘故)))))))
arg0: 
                    泰森 
                
arg1: 
                    他 
                
argm: 
                    之所以