Britain's Got Talent: Season 9

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "Britain's Got Talent" Season 9.
Constraints:
Use ONLY provided SYNOPSIS and SOURCES.
Do not invent/guess titles, names, dates, episode counts, awards, ratings, viewership, or plot points.
If a detail is not in the material, omit it.
Write original, neutral, encyclopedic prose in plain text.
No markdown, no asterisks, no headings, no bullet points (except for the array structure in JSON).
Output valid JSON only.
JSON Keys:
overview: factual 160-220 word summary of this season's narrative arc.
primer: array of exactly 4 concise bullet points summarizing essential previous lore, character positions, and stakes.
TMDB Synopsis: Reality talent show hosted by Ant and Dec. Any entertainment act can enter. Goal: impress judges and reach final stages. Prize: £100,000 and chance to perform at "Royal Variety Show". Judges: Simon Cowell, Piers Morgan, Amanda Holden.
Source [1]: Creators: Ken Warwick, Simon Cowell. Variety acts compete for Royal Variety Show.
Source [2]: British ITV program. Started June 9, 2007. Annual seasons.
Source [3]: Variety of acts perform for live audience and judges. Chance to win £250,000 and perform for British Royal Family at Royal Variety Performance. (Note: Conflict in prize amount between TMDB and Source 3: £100,000 vs £250,000. I must be careful. However, the prompt asks for Season 9. The sources don't mention Season 9 specifically, they talk about the show in general or specific past years like 2007, 2008, 2010).
Source [4]: Variety acts compete for Royal Variety Show.
Source [5]: Mentions 2007, 2008, and 2010 (Series 4) viewership.
Problem: The provided text does not contain information specific to "Season 9". It contains general information about the series and some historical data about earlier seasons (2007, 2008, 2010).
Constraint Check: "If a detail is not in the provided material, you omit it rather than guess."
Constraint Check: "Write ONLY verifiable