Game of Thrones: Season 7

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "Game of Thrones" Season 7.
Constraints:
Use ONLY provided SYNOPSIS and SOURCES.
No inventing/guessing titles, names, dates, etc.
If detail is not in material, omit it.
Write original, neutral, encyclopedic prose in plain text.
No markdown, no asterisks, no headings, no bullet points in the prose/summary.
Output valid JSON only.
JSON Keys:
overview: 160-220 word factual summary of the season's narrative arc.
primer: Array of exactly 4 concise bullet points summarizing essential previous lore, character positions, and stakes.
TMDB Synopsis: "The long winter is here. And with it comes a convergence of armies and attitudes that have been brewing for years."
Source [1]: "Seven noble families fight for control of the mythical land of Wes" (cut off, likely Westeros). "Winter is coming."
Source [3]: "Seven noble families fight for control of the mythical land of Westeros. Friction between the houses leads to full-scale war. All while a very ancient evil awakens in the farthest north. Amidst the war, a neglected military order of misfits, the Night's Watch, is all that stands between the realms of men and icy horror."
Source [4]: Created by David Benioff and D. B. Weiss for HBO. Adaptation of A Song of Ice and Fire by George R. R. Martin.
Source [5]: Similar to [3].
Overview Analysis:
The provided synopsis for Season 7 is: "The long winter is here. And with it comes a convergence of armies and attitudes that have been brewing for years."
The sources provide general series info: Seven noble families fighting for Westeros, friction leading to war, an ancient evil in the north, and the Night's Watch standing against icy horror.
Constraint Check: I must write a 160-220 word summary of this season's narrative arc.
Problem: The provided text for Season 7 is extremely brief ("The long winter is here. And with it comes a convergence of armies and attitudes that have been brewing for years."). The other sources describe the series in general, not specifically Season 7's plot details beyond the "long winter" mention.
Strict Adherence: I cannot invent plot points. If I only use the provided text, I cannot reach 160-2