original: It comprises the eastern half of the island of Timor, the nearby islands of Atauro and Jaco, and Oecussi-Ambeno, an exclave on the northwestern side of the island, within Indonesian West Timor.
simplifications: it makes up the eastern half of Timor island, Atauro, Jaco, and Oecussi-Ambeno. Oecussi-Ambeno is an exclave on the northwest side of the island in West Timor. It is made up of the eastern half of the island of Timor, islands of Atauro and Jaco, and Oecussi-Ambeno. It's the eastern half of Atauro and Jaco, Timor and Oecussi-Ambeno, an exclave on the island within West Timor. It makes up the eastern half of the island of Timor, and the nearby islands of Atauro and Jaco. It also makes up Oecussi-Ambeno, an exclave on the northwestern side of the island, in Indonesian West Timor. It is the eastern half of the island of Timor, the nearby islands Atauro and Jaco, and Oecussi-Ambeno, an exclave on the northwestern side of the island. That is in Indonesian West Timor. It is made up of the eastern half of Timor, the islands of Atauro and Jaco, and Oecussi-Ambeno. It includes the eastern half of Timor, the islands of Atauro and Jaco, and Oecussi-Ambeno, an area on the northwestern side of  Indonesian West Timor. It comprises the eastern half of the island of Timor, the nearby islands of Atauro and Jaco, and Oecussi-Ambeno(an exclave on the northwestern side of the island that is within Indonesian West Timor). It takes up the east side of the island of Timor, the islands of Atauro and Jaco as well as Oecussi-Ambeno on the northwest side, surrounded by Indonesian West Timor. It is made of the eastern half of the island of Timor, the nearby islands of Atauro and Jaco, and Oecussi-Ambeno. It is a territory on the northwestern side of the island, within Indonesian West Timor.