Assertion: balalaika's string | /r/CapableOf | arrange into two groups
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Source sentences:
text: Developed in its modern form during the 19th century by musical prodigy Vassilij Vassilevich Andreev, the contemporary balalaika comes in five sizes, the contrabass, bass, sekunda, prima, and piccolo, and customarily has either three strings or six arranged into two groups.