Complex sentence: Contra proferentem is a rule of contractual interpretation which provides that an ambiguous term will be construed against the party that imposed its inclusion in the contract-or, more accurately, against (the interests of) the party who imposed it.
Split into simpler sentences: Contra proferentem is a rule of contractual interpretation which provides that an ambiguous term will be construed against the party that imposed its inclusion in the contract. Or, more accurately against (the interests of) the party who imposed it.