Simplify the following text for a Grade 10 native English-speaking person.
Original: While the definition of `` alternative '' has been debated , the award was first presented in 1991 to recognize non-mainstream rock albums `` heavily played on college radio stations '' .
Simplified: The definition of `` alternative '' has been debated . The award was first presented in 1991 to recognize non-mainstream rock albums `` heavily played on college radio stations '' .