CREATE TABLE table_23621 ("\\u0410 \\u0430 [a]" TEXT, "\\u0411 \\u0431 [b]" TEXT, "\\u0412 \\u0432 [v]" TEXT, "\\u0413 \\u0433 [\\u0261]" TEXT, "\\u0413\\u044c \\u0433\\u044c [\\u0261\\u02b2]" TEXT, "\\u0413\\u04d9 \\u0433\\u04d9 [\\u0261\\u02b7]" TEXT, "\\u0494 \\u0495 [\\u0281/\\u0263]" TEXT, "\\u0494\\u044c \\u0495\\u044c [\\u0281\\u02b2/\\u0263\\u02b2]" TEXT)

what is [ ] when [a] is [ / ]?
SELECT "\u0413 \u0433 [\u0261]" FROM table_23621 WHERE "\u0410 \u0430 [a]" = 'Ҕә ҕә [ʁʷ/ɣʷ]'
SELECT "\u0413 \u0433 [\u0261]" FROM "table_23621" WHERE "\u0410 \u0430 [a]" = 'Ҕә ҕә [ʁʷ/ɣʷ]'