Examples: 1. John pushed Bill as he walked away. Who walked away? John or Bill? 2. John pushed Stacy as she walked away. Did Stacy walk away or did I just refer to John as being a woman? 3. Little Jenny hugged Miss Mary, pressing her cheek against her bosom. Who does each "her" belong to? It's easy going by context clues but I want to know the grammatical rules for each case.