Complex sentence: The direct construction is used when the subject of the transitive clause outranks the object in salience or animacy but the inverse is used when the "notional object" outranks the "notional subject".
Split into simpler sentences: The direct construction is used when the subject of the transitive clause outranks the object in salience or animacy. The inverse construction is used when the "notional object" outranks the "notional subject".