What is the relationship between 'Baidu' and 'search engine' in the context of the input sentence.
Options: member of, product/material produced, stock exchange, position held

Chinese Internet search engine Baidu (NASDAQ:BIDU) was downgraded early Wednesday, while drugmakers Valeant Pharmaceuticals International (NYSE:VRX) and Shire (NASDAQ:SHPG) also saw analyst action.
product/material produced