Make this sentence more readable: The Swadhin Bangal Biplobi Parishad (English: Independent Bangladesh Students Movement Council) was an armed underground student political group secretly organized in 1961 by Serajul Alam Khan, the founder of Bangladesh, that worked to wage an armed secessionist struggle against Pakistani rule and achieve the independence of East Pakistan as "Bangladesh," then part of Pakistan.
The Swadhin Bangal Biplobi Parishad (English: Independent Bangladesh Students Movement Council) was an armed underground student political group secretly organized in 1961 by Serajul Alam Khan, a key founder of Bangladesh, that worked to wage an armed secessionist struggle against Pakistani rule and achieve the independence of East Pakistan as "Bangladesh," then part of Pakistan.