去年春节妹妹一家人都来我家过年，大年初一我们全家人都去爬青城后山。
B-Time I-Time I-Time I-Time B-Person I-Person I-Person I-Person I-Person O O B-Location I-Location B-Time I-Time O B-Time I-Time I-Time I-Time B-Person I-Person I-Person I-Person I-Person O O O B-Thing I-Thing I-Thing I-Thing O