sentence1: Nasrallah joined Hezbollah after the 1982 Israeli invasion of Lebanon . In 1989 , Hassan Nasrallah traveled to Qom , Iran , where he furthered his religious studies .
sentence2: After the Israeli invasion of Lebanon in 1982 , Nasrallah joined Hezbollah , and in 1989 , Hassan Nasrallah traveled to Qom , Iran , where he continued his religious studies .