sentences:  The name of the defense reflects the behavior of the other four defenders—they attempt to "pack" within an imaginary "line" located about 2 feet (0.6 m) inside the three-point line, with the main goal of stopping dribble penetration, only venturing outside the line if their assigned player is preparing to receive a pass.When the elder Bennett first developed the system, he actually taped a "pack line" to Green Bay's practice court as a teaching tool, and when he moved to Wisconsin had a similar line painted on the team's practice court.The system has become increasingly popular in 21st-century college basketball.