sentences:  With their DC-10s grounded, BCal took a short-term lease of a 747 to provide adequate capacity on its Nigerian trunk routes during that period.BCal also operated a Dan-Air Comet on short-term lease between Gatwick and Tripoli while the 707s normally used on that service were redeployed to operate a reduced schedule to Houston and South America.In addition to these aircraft, a Boeing 707-120B was leased during that period as well to cover the shortfall in capacity.