Assertion: web crawler | /r/ObjectUse | used by a search engine
Facets:
value: to content
type: PURPOSE
Source sentences:
text: A web crawler (also known as a web spider, spider bot, web bot, or simply a crawler) is a computer software program that is used by a search engine to index web pages and content across the World Wide Web.
text: A web crawler (also known as a web spider, spider bot, web bot, or simply a crawler) is a computer software program that is used by a search engine to index web pages and content across the World Wide Web.