ambiguous sentence

yuji8

He is the owner of the jewel she have seen this morning.
He is the owner of the jewel seen by her this morning.
请问今早被她看到的是珠宝还是珠宝主人？

He buys a car with a cool device, which is sold out now.
请问卖光的是车子还是新奇装置？

Americans and Chinese whose hobbies are fishing are admitted to the club.
是美国人都可以参加这个俱乐部、还是美国人也要爱钓鱼才能加入？