CREATE TABLE "group_a" (
  "nation" text,
  "skip" text,
  "third" text,
  "second" text,
  "lead" text,
  "alternate" text
);

Question: Who is the second for the curling team which has alternate Margarita Fomina?
SQL: SELECT "second" FROM "group_a" WHERE "alternate"='margarita fomina';

Question: Who is the second for the team with alternate Margarita Fomina?
SQL: SELECT "second" FROM "group_a" WHERE "alternate"='margarita fomina';

Question: Who is the alternate for the team for which Monika Wagner is the third?
SQL: SELECT "alternate" FROM "group_a" WHERE "third"='monika wagner';

Question: Who is the lead for the team with Nkeiruka Ezekh as second?
SQL: SELECT "lead" FROM "group_a" WHERE "second"='nkeiruka ezekh';

Question: Who is the lead for the team with Christina Haller as alternate?
SQL: SELECT "lead" FROM "group_a" WHERE "alternate"='christina haller';