CREATE TABLE table_2053 ("Index" FLOAT, "Ozone ,  Running 8 hourly mean  ( \\u03bcg/m 3  ) " TEXT, "Nitrogen Dioxide ,  Hourly mean  ( \\u03bcg/m 3  ) " TEXT, "Sulphur Dioxide ,  15 minute mean  ( \\u03bcg/m 3  ) " TEXT, "PM10 Particles ,  24 hour mean  ( \\u03bcg/m 3  ) " TEXT, "PM2.5 Particles ,  24 hour mean  ( \\u03bcg/m 3  ) " TEXT)

What's the number of pm10 particles when sulphur dioxide is at 266-354?
SELECT "PM10 Particles, 24 hour mean (\u03bcg/m 3 )" FROM table_2053 WHERE "Sulphur Dioxide, 15 minute mean (\u03bcg/m 3 )" = '266-354'
SELECT "PM10 Particles, 24 hour mean (\u03bcg/m 3 )" FROM "table_2053" WHERE "Sulphur Dioxide, 15 minute mean (\u03bcg/m 3 )" = '266-354'