original: invest or storm 91c , was an unusual weather event of 2006 .
simplifications: invest or storm 91c , was an unusual weather event of 2006 . invest or storm 91c , was an unusual weather event of 2006 . invest , or storm 91c , was an uncommon weather event of 2006 . invest or storm 91c , was an unusual weather event in 2006 . invest or storm 91c , was a different weather event of 2006 . storm 91c or invest , was an odd weather event of 2006 . invest or storm 91c , was a strange weather event of 2006 . 1 . invest or storm 91c , was an odd weather event of 2006 .