Conversation so far:
What politics was Sri Aurobindo into?
Sri Aurobindo joined the Indian movement for independence from British rule
What other revolutionaries got involved in the Indian Movement for independence from British Rule?
In 1908, Khudiram Bose and Prafulla Chaki attempted to kill Magistrate Kingsford, a judge known for handing down particularly severe sentences against nationalists.

Question: What stopped them?
Self-contained rewrite: What stopped Khudiram Bose and Prafulla Chaki from killing Magistrate Kingsford?