51.  Prison officials concede that overcrowding is the principal reason for violent inmate insurrections that have become almost a daily occurrence.

52.  Prison officials concede that overcrowding is the principal reason for violent rebellions that have become almost a daily occurrence.

53.  A principal reason for the resurgence of crude prices this month has been the explosive situation in Israel and the West Bank.

54.  According to him, multiple irregularities in distributing aid are the principal reason for the waste.

55.  Edwards, who met with News Limited chief executive Ken Cowley earlier this week, said News Corp. supremo Rupert Murdoch was only in town for one principal reason.

56.  The principal reason for the new rapprochement has of course been the US-led war against terror launched following the attacks on New York and Washington.

57.  It cited the hostility of mothers towards their estranged partners as the principal reason for lack of paternal contact.