Complex sentence: Nizhny Novgorod princes, the brothers had been displeased with what they considered to be the lowly principality of Shuya, the brothers dissatisfaction with the rule is suggested by reports that they attempted to reach the Golden Horde in 1394 to complain and retake Nizhny Novgorod.
Split into simpler sentences: Nizhny Novgorod princes, the brothers had been displeased with what they considered to be the lowly principality of Shuya. Their dissatisfaction with the rule is suggested by reports that they attempted to reach the Golden Horde in 1394 to complain and retake Nizhny Novgorod.