密度递进摘要：在字数不变的前提下，把信息塞到极致

You will ask me for an article. Then you will generate increasingly concise,
entity-dense summaries of the article article.

Repeat the following 2 steps 5 times.

Step 1. Identify 1-3 informative entities (';' delimited) from the article
which are missing from the previously generated summary.

Step 2. Write a new, denser summary of identical length which covers every
entity and detail from the previous summary plus the missing entities.

A missing entity is:
- relevant to the main story,
- specific yet concise (5 words or fewer),
- novel (not in the previous summary),
- faithful (present in the article),
- anywhere (can be located anywhere in the article).

Guidelines:
- The first summary should be long (4-5 sentences, ~80 words) yet highly
  non-specific, containing little information beyond the entities marked as
  missing. Use overly verbose language and fillers (e.g., 'this article
  discusses') to reach ~80 words.
- Make every word count: rewrite the previous summary to improve flow and make
  space for additional entities.
- Make space with fusion, compression, and removal of uninformative phrases
  like 'the article discusses'.
- The summaries should become highly dense and concise yet self-contained,
  i.e., easily understood without the article.
- Missing entities can appear anywhere in the new summary.
- Never drop entities from the previous summary. If space cannot be made, add
  fewer new entities.

Remember, use the exact same number of words for each summary.

Answer in JSON. The JSON should be a list (length 5) of dictionaries whose
keys are 'Missing_Entities' and 'Denser_Summary'.

先向我索取一篇文章。然后你要为这篇文章生成一系列越来越简洁、实体密度越来越高的摘要。

把下面两个步骤重复 5 次。

步骤一：从文章中找出 1–3 个有信息量的实体（用「;」分隔），
这些实体是上一版摘要里没有的。

步骤二：写一版新的、更密的摘要，长度与上一版完全相同，
要覆盖上一版摘要中的每一个实体和细节，再加上这次找出的缺失实体。

「缺失实体」的定义是：
- 与主线相关
- 具体但简洁（不超过 5 个词）
- 新出现的（上一版摘要中没有）
- 忠实的（确实出现在原文中）
- 位置不限（可以在文章的任何地方）

准则：
- 第一版摘要应当较长（4–5 句，约 80 词）但高度不具体，
  除了标记为缺失的实体之外，几乎不含什么信息。
  可以使用啰嗦的措辞和填充语（例如「本文讨论了」）来凑够约 80 词。
- 让每一个字都有用：重写上一版摘要以改善行文，腾出空间容纳更多实体。
- 通过合并、压缩、删除「本文讨论了」这类无信息量的短语来腾空间。
- 摘要应当变得高度浓缩且简洁，同时保持自足——
  即不看原文也能读懂。
- 缺失实体可以出现在新摘要的任何位置。
- 绝不要丢弃上一版摘要中已有的实体。如果实在腾不出空间，就少加几个新实体。

记住：每一版摘要都要使用完全相同的字数。

以 JSON 格式回答。JSON 应当是一个长度为 5 的列表，
每个元素是一个字典，键为 'Missing_Entities' 和 'Denser_Summary'。