CREATE TABLE "comparative_methods" (
  "name" text,
  "number_of_sequences_number_of_sequences" text,
  "alignment_alignment_predicts_an_alignment" text,
  "structure_structure_predicts_structure" text,
  "knots_knots_pseudoknot_prediction" text,
  "link" text
);

Question: What is the pseudoknot prediction of the software named tfold?
SQL: SELECT "knots_knots_pseudoknot_prediction" FROM "comparative_methods" WHERE "name"='tfold';