CREATE TABLE table_name_29 (town VARCHAR, structural_type VARCHAR, country VARCHAR)

Which Town has a Structural type of guyed mast and a Country of belgium?
SELECT town FROM table_name_29 WHERE structural_type = "guyed mast" AND country = "belgium"
SELECT "town" FROM "table_name_29" WHERE "belgium" = "country" AND "guyed mast" = "structural_type"