Complex sentence: Reportedly, it started with a cluster of Arizona prisoners transported there against their will consequent to a contract with the State of Arizona and GEO Group; they took off their shirts as a display of non-compliance.
Split into simpler sentences: Reportedly, it started with a cluster of Arizona prisoners transported there against their will consequent to a contract with the State of Arizona and GEO Group. They took off their shirts as a display of non-compliance.