Complex sentence: The best known of these lies beneath Kufra Oasis in southeastern Cyrenaica, but an aquifer with even greater reputed capacity is located near the oasis community of Sabha in the southwestern desert.
Split into simpler sentences: The best known of these lies beneath Kufra Oasis in southeastern Cyrenaica. An aquifer with even greater reputed capacity is located near the oasis community of Sabha in the southwestern desert.