Assertion: web crawler | /r/CapableOf | take great care
Facets:
value: to spread their visits
type: PURPOSE
value: typically
type: DEGREE
Source sentences:
text: Web crawlers typically take great care to spread their visits to a particular site over a period of time, because they access many more pages than the normal (human) user and therefore can make the site appear slow to the other users if they access the same site repeatedly.