。
She taught wealthy Indian girls.
Literal
She [topic-は] wealthy [genitive-の] India [genitive-の] girls [object-を] taught.
Triple の-stacking modifies a single head noun: 金持ちの・インドの・少女達 ('wealthy + Indian + girls'). Japanese can chain the genitive freely as long as the modifying order makes sense — here, both modifiers describe 少女達 in parallel, not nested. 達 is the plural suffix for animate beings, neutral compared to the more formal 方々 or the rough ら. 教える takes its student with the direct-object marker を — the person taught is conceptualized as the recipient of teaching action.