List the first team's name in the match with the highest winning margin.
team's name refers to Team_Name; first team refers to Team_Id = Team_1; the highest winning margin refers to max(Win_Margin)
SELECT T2.Team_Name FROM Match AS T1 INNER JOIN Team AS T2 ON T2.Team_Id = T1.Team_1 ORDER BY T1.Win_Margin DESC LIMIT 1