Complex sentence: In October 2012, Yelp placed a 90-day "consumer alert" on 150 business listings believed to have paid for reviews that read "We caught someone red-handed trying to buy reviews for this business".
Split into simpler sentences: In October 2012, Yelp placed a 90-day "consumer alert" on 150 business listings believed to have paid for reviews. The alert that read "We caught someone red-handed trying to buy reviews for this business".