Original sentence: He is mainly frustrated due to irresponsible behavior of top-BJP leadership who is still refraining from taking the collective responsiblity of 2009 election defeat and consequential introspection as pointed out in his letter written to BJP president Rajnath Singh.Yashwant Sinha (born November 6, 1937, Patna) is an Indian politician and a former finance minister of India (1990-1991 under Prime Minister Chandra Shekhar and March 1998 - July 2002 under Prime Minister Atal Bihari Vajpayee) and foreign minister (July 2002 - May 2004) in Atal Bihari Vajpayee's cabinet
Edited sentence: He is mainly frustrated due to irresponsible behavior of top-BJP leadership who is still refraining from taking the collective responsibility of 2009 election defeat and consequential introspection as pointed out in his letter written to BJP president Rajnath Singh.Yashwant Sinha (born November 6, 1937, Patna) is an Indian politician and a former finance minister of India (1990–1991 under Prime Minister Chandra Shekhar and March 1998 – July 2002 under Prime Minister Atal Bihari Vajpayee) and foreign minister (July 2002 – May 2004) in Atal Bihari Vajpayee's cabinet