Complex sentence: Silva entered politics by joining the Sri Lankan Freedom Party but later joined the United National Party.He rejoined the Sri Lankan Freedom party following the massive public outcry that wanted him to join the party of his roots.
Split into simpler sentences: Silva entered politics by joining the Sri Lankan Freedom Party but later joined the United National Party. He later rejoined the Sri Lankan Freedom Party, citing "massive public outcry" that wanted him to join the party of his roots.