CREATE TABLE "opinion_polling_for_the_united_states_se" (
  "poll_source" text,
  "dates_administered" text,
  "democrat_tom_harkin" text,
  "republican_christopher_reed" text,
  "lead_margin" real
);

Question: What were the dates administered in the Survey USA poll source where Republican Christopher Reed received 37%?
SQL: SELECT "dates_administered" FROM "opinion_polling_for_the_united_states_se" WHERE "poll_source"='survey usa' AND "republican_christopher_reed"='37%';

Question: What percentage did Republish Christopher Reed receive when the lead margin was smaller than 16?
SQL: SELECT "republican_christopher_reed" FROM "opinion_polling_for_the_united_states_se" WHERE "lead_margin"<16;

Question: What were the dates administered when the lead margin was smaller than 39 with Republican Christopher Reed at 37% and Democrat Tom Harkin at 53%?
SQL: SELECT "dates_administered" FROM "opinion_polling_for_the_united_states_se" WHERE "lead_margin"<39 AND "republican_christopher_reed"='37%' AND "democrat_tom_harkin"='53%';

Question: What was Democrat: Tom Harkin's percentage when the poll source was Rasmussen Reports and the lead margin was 14?
SQL: SELECT "democrat_tom_harkin" FROM "opinion_polling_for_the_united_states_se" WHERE "poll_source"='rasmussen reports' AND "lead_margin"=14;

Question: What were the dates administered when the lead margin was larger than 14 and the poll source was Research 2000?
SQL: SELECT "dates_administered" FROM "opinion_polling_for_the_united_states_se" WHERE "lead_margin">14 AND "poll_source"='research 2000';