Cecilia Wairimu (born 28 November 1980), better known by her stage name Amani, is a Kenyan singer and songwriter. Her contributions to the Kenyan music industry have earned her several coveted accolades, including the Best Female category at the 2009 MTV Africa Music Awards, Pearl of Africa Music Awards, Kisima Awards and Chaguo La Teeniez Awards. She released her debut album in 2006.
The awards she won were unimportant
This statement is definitely correct, because the context states that the awards were coveted. The system may have gotten this wrong because it did not make this connection. 
( z1 important :polarity - :ARG1 ( z2 award :ARG1-of ( z3 win :ARG0 ( z4 she ) ) ) )