When Bron left Russia in 1987 to teach at the Royal Academy of Music in London , Vengerov and his mother followed him there . They also followed Bron when he moved to LÃ 1\/4 beck to open a school there . When Bron left Russia in 1987 to teach at the Royal Academy of Music ( RAM ) , Vengerov and his mother followed him there , and did so again after Bron moved to LÃ 1\/4 beck to open a school there .