What is the relationship between Baidu and search engine in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Reports earlier this year said Lyft's valuation was $2.5 billion based on the latest funding, which is still well below that of ride-sharing giant Uber, valued at $50 billion and backed by Chinese search engine giant Baidu (Xetra: A0F5DE - news ) , among others.

Answer: product_or_material_produced