Complex sentence: In 1946, following World War II, Singapore became a separate Crown Colony; the other Straits Settlements, Malacca and Penang, joined the Malay states (including Johor) to form the Malayan Union.
Split into simpler sentences: In 1946, following World War II, Singapore became a separate Crown Colony. The other Straits Settlements, Malacca and Penang, joined the Malay states (including Johor) to form the Malayan Union.