The parents of the students killed during the Virginia Tech university massacre are calling for the promoters of an upcoming benefit concert to wipe Nas' name off the bill - because they feel his lyrics are inappropriate. Nas was announced as one of the performers at the upcoming free concert, which has been organised to "lift the spirits" of the Virginia Tech community, but the parents of victims are asking organisers to reconsider the line-up. Vincent J. Bove, who claims to be spokesman for seven of the victims' families, claims Nas' inclusion is disrespectful because the rapper's violent lyrics won't set a good tone at the event. Bove claims Nas' lyrics are "indicative of the moral decay in our society that contributes to acts of violence. "For a university official to condone it or to be clueless of what this person's track record is, it's unconscionable beyond belief." The concert, which is also to feature the Dave Matthews Band and John Mayer, will take place on 6 September (07). Organisers state they have no plans to revise the line-up. Thirty-two people were shot dead at the Blacksburg, Virginia university when student Seung-Hui Cho staged a rampage, before killing himself in April (07).