Complex sentence: On 8 January 2017, some anonymous groups conducted a well-organised a protest at Chennai Marina beach to revoke the ban on Jallikattu which was imposed in 2014 and to ban the PETA (People for Ethical Treatment of Animal).
Split into simpler sentences: On 8 January 2017, some anonymous groups conducted a well-organised a protest at Chennai Marina beach to revoke the ban on Jallikattu which was imposed in 2014. And to ban the PETA (People for Ethical Treatment of Animal).