On the great island of Borneo, East Malaysia's states of Sarawak and Sabah surround the enclave of the oil-rich sultanate of Brunei.
There are three countries with territory in Borneo.
mnli hypothesis: There are three countries with territory in Borneo. premise: On the great island of Borneo, East Malaysia's states of Sarawak and Sabah surround the enclave of the oil-rich sultanate of Brunei.