Complex sentence: It is written in Sanskrit language, and is one of 14 Vaishnava Upanishads, recommends the bhakti of Lord Narayana (Vishnu), and is associated with the "Krishna Yajurveda".
Split into simpler sentences: It is written in Sanskrit language, and is one of 14 Vaishnava Upanishads. The scripture belongs to the Vaishnava sect, which worships Lord Narayana (Vishnu), and is associated with the "Krishna Yajurveda".