Complex sentence: The breakthrough was sped up by a double-blind concert kantele test in 1993 at a musical instrument building school in Ikaalinen where two of the instruments became 1st and 2nd in the group of 7 builders and 8 kanteles in total.
Split into simpler sentences: The breakthrough was sped up by a double-blind concert kantele test in 1993. The concert was held at a musical instrument building school in Ikaalinen where two of the instruments became 1st and 2nd in the group of 7 builders and 8 kanteles in total.