Assertion: bookmaker's bet | /r/HasProperty | placed betting exchanges
Facets:
Source sentences:
text: When the free bet is placed the other bookmakers or betting exchanges are used to hedge all the possible outcomes so that no matter what happens the value of the free bet is retained.
text: Every bet placed on a betting exchange involves two bets really - one bet backing the selection to win, and a second bet backing the same selection to lose.