CREATE TABLE table_name_18 (round INTEGER, college VARCHAR, overall VARCHAR)
SELECT MAX(round) FROM table_name_18 WHERE college = "nebraska" AND overall < 190
รอบสูงสุดสำหรับ College of Nebraska คือเมื่อคะแนนรวมต่ำกว่า 190
What is the highest round for College of Nebraska if the Overall is under 190?