CREATE TABLE "composition" (
  "company" text,
  "icb_sector" text,
  "ticker_symbol" text,
  "index_weighting_pct_at_17_january_2013" real,
  "market_cap_at_april_2013" real
);

Question: Which ICB Sector had a ticker symbol of pp?
SQL: SELECT "icb_sector" FROM "composition" WHERE "ticker_symbol"='pp';

Question: Which ICB Sector belongs to vallourec?
SQL: SELECT "icb_sector" FROM "composition" WHERE "company"='vallourec';