〔R14〕 He went to the wood and caught it;
He sat him down and sought it;
Because he could not find it,
Home with him he brought it.
〔译注〕 他到树林而抓到它；
他坐下来而寻找它；
因为他不能找到它，
所以跟着回家他带它。
〔提问〕 If it is as prickly (含刺的) as the thistle (蓟), what is it?
〔谜底〕
th___