CREATE TABLE "opinion_polls" (
  "polling_firm" text,
  "date_published" text,
  "t_papadopoulos" text,
  "d_christofias" text,
  "i_kasoulidis" text,
  "k_themistokleous" text
);

Question: Which polling firm put T. Papadopoulos at 31%?
SQL: SELECT "polling_firm" FROM "opinion_polls" WHERE "t_papadopoulos"='31%';

Question: What was the percentage for T. Papadopoulos when I. Kasoulidis was 27.1%?
SQL: SELECT "t_papadopoulos" FROM "opinion_polls" WHERE "i_kasoulidis"='27.1%';

Question: What was the percentage for K. Themistokleous when I. Kasoulidis was 30.1%?
SQL: SELECT "k_themistokleous" FROM "opinion_polls" WHERE "i_kasoulidis"='30.1%';

Question: What was the percentage for T. Papadopoulos when D. Christofias was 28.4%?
SQL: SELECT "t_papadopoulos" FROM "opinion_polls" WHERE "d_christofias"='28.4%';