When used inside vocabulary, 『は』 is read as 『は』 (ha). It is also used as a grammatical particle to mark the topic of a sentence. When marking the topic, it is written as 『は』 but pronounced 『わ』 (wa). The topic indicates what the sentence is about and is often implied in Japanese. For example: 『わたしは あなたが どこに すんで いるか しって いる』 (watashi wa anata ga doko ni sunde iru ka shitte iru, 'I know where you live').