Table:
text: Northwest Missouri State Bearcats football
Post season results
Post season results
Year_ NW_Rank Venue Opp_Rank Opponent Score W_L Round Notes_
1984 -- Away -- Nebraska-Omaha 15-28 L 1st Round 
1989 18 Away -- Pittsburg State 7-28 L 1st Round 
1996 2 Away -- Nebraska-Omaha 22-21 W 1st Round 
1996 2 Away -- Northern Colorado 26-27 L Quarterfinal 
1997 3 Maryville 16 North Dakota State 39-28 W 1st Round 
1997 3 Maryville -- Northern Colorado 19-35 L Quarterfinal 
1998 2 Maryville 16 Nebraska-Omaha 28-14 W 1st Round 
1998 2 Maryville 6 Northern Colorado 42-17 W Quarterfinal 
1998 2 Maryville 11 Texas A&M-Kingsville 49-34 W Semifinal 
1998 2 Braly Stadium 3 Carson-Newman 24-6 W Finals

Question: Who was the Northwest Missouri State Bearcats' only football opponent in 1984?

Question: Who was an opponent for Northwest Missouri State Bearcats football in 1996 and 1997?