Question:  how many mens singles with mens doubles being Pontus Jantti Lasse Lindelöf
SQL: SELECT COUNT("Mens singles") FROM "1-13857700-1" WHERE "Mens doubles" = 'Pontus Jantti Lasse Lindelöf';

Question: who is the the mens doubles with mixed doubles being Jimm Aalto Nina Sarnesto
SQL: SELECT "Mens doubles" FROM "1-13857700-1" WHERE "Mixed doubles" = 'Jimm Aalto Nina Sarnesto';

Question: who is the the mixed doubles with year being 1972
SQL: SELECT "Mixed doubles" FROM "1-13857700-1" WHERE "Year" = 1972.0;

Question: who is the the mens doubles with year being 1978
SQL: SELECT "Mens doubles" FROM "1-13857700-1" WHERE "Year" = 1978.0;

Question: who is the the mens singles with mens doubles being Kaj Lindfors Kaj Osterberg
SQL: SELECT "Mens singles" FROM "1-13857700-1" WHERE "Mens doubles" = 'Kaj Lindfors Kaj Osterberg';