Complex sentence: The term "mindfulness" is derived from the Pali-term "sati", "mindfulness", which is an essential element of Buddhist practice, including vipassana, satipaṭṭhāna and anapanasati.
Split into simpler sentences: The term "mindfulness" is derived from the Pali-term "sati". Sati is an essential element of Buddhist practice, including vipassana, satipaṭṭhāna and anapanasati.