(NP-PN-SBJ 
  (NR 美香)
                    
  (CC 和)
                    
  (NR 天天))
                    
(VP 
  (VC 是)
                    
  (VP 
    (PP-MNR 
      (P 作为)
                    
      (NP 
        (IP-APP 
          (NP-PN-SBJ 
            (NR 中)
                    
            (NR 美))
                    
          (VP 
            (VSB 
              (VV 合作)
                    
              (VV 研究))
                    
            (NP-OBJ 
              (NN 大熊猫))))
                    
        (NP 
          (NN 项目))))
                    
    (VP 
      (VV 租给)
                    
      (NP-PN-IO 
        (NR 华盛顿)
                    
        (NN 国家)
                    
        (NN 动物园)))))
arg2: 
                    美香 和 天天          
                
argm: 
                    作为 中 美 合作 研究 大熊猫项目          
                
arg1: 
                    华盛顿 国家 动物园