CREATE TABLE table_203_759 (id DECIMAL, "year" DECIMAL, "company" TEXT, "number of members affected" DECIMAL, "duration of strike" TEXT, "notes" TEXT)

how long were employees of nynex on strike ?
SELECT "duration of strike" FROM table_203_759 WHERE "company" = 'nynex'
SELECT "duration of strike" FROM "table_203_759" WHERE "company" = 'nynex'