Trisect a Median

Geometry Level 3

In the diagram above, suppose that \( BA_{1} = A_1A_2 = A_2C \) and \(AC_1 = C_1B \). If \(C_1Y = 2017\), then \(XY = \frac{p}{q} \), where \(p\) and \(q\) are coprime positive integers. Find \(p + q\).

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