Complex sentence: Asquith was a key target amongst the suffragettes, the windows of 10 Downing Street had been smashed in 1908 and in 1912 in Dublin his carriage was attacked by Mary Leigh.
Split into simpler sentences: Asquith was a key target amongst the suffragettes. The windows of 10 Downing Street had been smashed in 1908 and in 1912 in Dublin his carriage was attacked by Mary Leigh.