question: When did Sassou reveal that there would be a vote to alter the 2002 constitution ?
answer: March 27 , 2015
turker_answer: On March 27 , 2015 , Sassou revealed that there would be a vote to alter the 2002 constitution .
rule-based: Sassou revealed that there would be a vote to alter the 2002 constitution in March 27 , 2015 .