一个家庭计划要建设，今年在房前屋后栽下树，十年后就可盖房子，并给儿子娶媳妇了。
O O B-Organization I-Organization O O O O O O B-Time I-Time O B-Location I-Location I-Location I-Location O O B-Thing O B-Time I-Time I-Time O O O B-Thing I-Thing O O O B-Person I-Person I-Person I-Person I-Person O O