(IP (NP-SBJ (NN 古人)) (VP (PP-ADV (P 比) (NP (NN 今人))) (ADVP (AD 更)) (VP (VV 懂) (IP-OBJ (NP-SBJ (-NONE- *PRO*)) (VP (VP (VV 下乡)) (VP (VV 走) (ADVP (AD 透透)))))))) arg0: *PRO*