sentence2_structure: A ligament<>is<>a short band of tough connective tissue$$$tough connective tissue<>connects together<>to form a joint
sentence1: Ligaments are strong bands of tissue that connect bones at the joint.
sentence2: A ligament is a short band of tough connective tissue that connects bones together to form a joint.
question: What is a short band of tough connective tissue that connects bones together to form a joint?