Xiang is a research student at a university; when writing her graduate thesis, she wants to quote the following four types of information. Which type of information may not conform with proper citation requirements stipulated by copyright laws? (1)A photographer's complete collection of East Taiwan photography not yet released to the public. (2)The Tourism Bureau's statistics on changes in number of visitors to Taiwan over the past decade (3)Paragraphs from three articles in databases of Education-related journals (4)Abstracts from seminar papers previously published by herself and her supervising professor