Ahmedabad, April 27 (ANI): Congress party on Sunday attacked the BJP, saying that BJP leaders know where the black money is and how to bring it back. Addressing a news conference in Ahmedabad Congress leader Anand Sharma said BJP knows how to put black money in use. Meanwhile, Sharma said BJP's campaign revolved around one individual. Further, Sharma asked Election Commission to take notice of BJP's election campaigning as it was using Mahatma Gandhi's image.