With the number of electorates (2009) greater than 272,902, and 192 as the constituency number, what is the reserved for (SC / ST /None)?
CREATE TABLE "assembly_segments" (
  "constituency_number" text,
  "name" text,
  "reserved_for_sc_st_none" text,
  "district" text,
  "number_of_electorates_2009" real
);
SELECT "reserved_for_sc_st_none" FROM "assembly_segments" WHERE "number_of_electorates_2009">'272,902' AND "constituency_number"='192';