困而知之

http://data.library.sh.cn/gj/entity/seal/nsd4nyif27rue5c1 an entity of type: Seal

困而知之 
困而知之 
徐悲鸿 
困而知之 
困而知之 
shl:Seal
<http://data.library.sh.cn/entity/person/rbxp5yexyiyet6xo>
<http://data.library.sh.cn/gj/resource/img/uds8hzcjcpz5ffey>

data from the linked data cloud