Complex sentence: Dootone had previously confirmed to trades that their recording contract with the Penguins spanned three years; a court decision found this contract was invalid as three of the four members of the group were minors at the time of their signing.
Split into simpler sentences: Dootone had previously confirmed to trades that their recording contract with the Penguins spanned three years. A court decision found this contract was invalid as three of the four members of the group were minors at the time of their signing.