user: Question: What is the other abbreviation of the constellation that has β Trianguli as its brightest star?
Columns: ['Constellation', 'IAU abbreviation', 'Other abbreviation', 'Genitive', 'Family', 'Origin', 'Meaning', 'Brightest star']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Andromeda /ænˈdrɒmɨdə/', 'And', 'Andr', 'Andromedae /ænˈdrɒmɨdiː/', 'Perseus', 'ancient ( Ptolemy )', 'Andromeda (The chained lady or the Princess)', 'Alpheratz']
SQL:

assistant: SELECT "Other abbreviation" FROM "Table" WHERE "Brightest star" = 'β Trianguli';