since; the fact ofThis is 지 followed by the topic particle 는. After a verb, 지는 can refer to the time since an action occurred or to the fact/content of an action, often with a contrastive nuance. It is commonly written with a space after the verb stem, as in 온 지는 or 한 지는.
KO: 한국에 온 지는 벌써 3년 됐어.
EN: It's already been three years since I came to Korea.