Complex sentence: This practice was increasingly being challenged in coastal areas, where a growing middle class was rising among lower caste Sinhalese, but the lower-caste Buddhists lacked an organized ordination lineage that wasn't dependent on the majority higher-caste monks for ordinations.
Split into simpler sentences: This practice was increasingly being challenged in coastal areas, where a growing middle class was rising among lower-caste Sinhalese. The lower-caste Buddhists lacked an organised ordination lineage that wasn't dependent on the majority higher-caste monks for ordinations.