Suppose The musical group ABBA was formed in Stockholm in 1972. The band members included Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad. Their breakthrough came with the 1974 Eurovision Song Contest where they won with the song "Waterloo".
Can we infer that ABBA was formed in Oslo in 1972? Yes, no, or maybe?