Table:
text: Jake Ellenberger
Mixed martial arts record
Mixed martial arts record
Res_ Record Opponent Method_ Event Round Time_ Location_
Win 11–0 Kenneth Allen Submission (armbar) IFC: Rumble on the River 1 N/A Kearney, Nebraska , United States
Win 10–0 Mark Bear TKO (cut) VFC 12: Warpath 2 N/A Council Bluffs, Iowa , United States
Win 9–0 Laverne Clark Submission (triangle choke) KOTC 64: Raging Bull 2 3:06 Cleveland, Ohio, United States
Win 8–0 Sean Huffman Submission (punches) VFC 11: Demolition 3 0:22 Council Bluffs, Iowa, United States
Win 7–0 Brian Daley TKO (punches) AFC 4: New Hitter 1 1:31 Omaha, Nebraska, United States
Win 6–0 Evan Boemer KO (punches) Extreme Challenge 65 1 0:48 Medina, Minnesota , United States
Win 5–0 Brent Shepard KO (punch) All Fighting Championships 3 1 N/A Omaha, Nebraska, United States

Question: What method was used on Jake Ellenberger's opponent Kenneth Allen?