Match of the Day: Season 1966/67

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "Match of the Day" Season 3.
Constraints:
Use ONLY provided synopsis and sources.
No invented titles, names, dates, counts, awards, ratings, box-office, viewership, or plot points.
If detail is missing, omit it.
Style: Original, neutral, encyclopedic prose in plain text.
Format: Valid JSON only (no markdown, no asterisks, no headings, no bullet points).
JSON Keys: overview (160-220 words), primer (array of exactly 4 concise bullet points).
Synopsis: "In the year that saw England win the World Cup, Match of the Day moves to BBC ONE."
Source [1]: "BBC's football highlights and analysis. 'The longest-running football television programme in the world' as recognised by Guinness World Records".
Source [2]: "BBC's football highlights and analysis. 'The longest-running football television programme in the world' as recognised by Guinness World Records in 2015."
Source [3]: "Match of the Day (abbreviated to MOTD) is a football highlights programme, typically broadcast on BBC One on Saturday nights during the Premier League season."
Source [4]: Mentions streaming platforms and an 84% rating (not relevant to Season 3 narrative or lore).
Overview requirement: 160-220 words factual summary of Season 3's narrative arc.
Problem: The synopsis only says: "In the year that saw England win the World Cup, Match of the Day moves to BBC ONE."
Constraint Check: I cannot invent details. I cannot guess the year. I cannot invent plot points.
Attempting to write the overview:
The third season of Match of the Day occurs during the same year that England won the World Cup. During this period, the programme moves to BBC ONE. Match of the Day is a football highlights and analysis programme. It is recognized by Guinness World Records as the longest-running football television programme in the world. The show typically broadcasts on Saturday nights during the Premier League season. (This is only ~65 words).
Wait: The prompt asks for a 160-220 word summary. If the source material is insufficient to reach that word count without inventing facts, I must follow the instruction "If a detail is not in the provided material, you omit it rather than guess." However, the prompt also specifies a