第一范式第二范式第三范式的问题

比如这张图片，如果我需要写UNF,1NF,2NF和3NF。
但是我不太清楚naming sponsor和amount of sponsorship这两个要不要在UNF的时候就包括。
当然我也不确定，我先瞎写一点，好心的同学能不能帮我看看对错。
UNF：carnival: (location, director, events, naming_sponsor, sponsor_name, amount_sponsorship, contact_name, contact_phone)
1NF: carnival: (location(p), director, events, naming_sponsor, sponsor_name, amount_sponsorship, contact_name, contact_phone)
2NF: 和1NF一样
3NF: carnival: (location(p), director, events, sponsor_name(F))
sponsor: (sponsor_name(p), naming_sponsor, amount_sponsorship, contact_name, contact_phone)
但是看其他例题，似乎有时候再UNF那边也会加括号，有时候又不加。具体是什么情况采需要加括号呢？