The Ed Sullivan Show: Season 4

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "The Ed Sullivan Show" Season 4.
Constraint 1: Use ONLY provided synopsis and sources.
Constraint 2: No invented titles, names, dates, counts, awards, ratings, box-office, viewership, or plot points.
Constraint 3: If detail is not in material, omit it.
Constraint 4: Write original, neutral, encyclopedic prose in plain text (no markdown, no asterisks, no headings, no bullet points).
Constraint 5: Output valid JSON only.
Keys required:
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.
SYNOPSIS: "Season 4 is on the 'Toast of the Town' guide."
SOURCE [1]: Show originally ran on CBS from June 20, 1948 to June 6, 1971.
SOURCE [2]: Features Ed Sullivan, The Ray Bloch Orchestra, Ray Bloch, Ralph Paul. Classic prime time variety show famous for vaudeville acts and rock music performances.
SOURCE [3]: Ran on CBS from June 20, 1948, to March 28, 1971. Hosted by Ed Sullivan (NY entertainment columnist).
SOURCE [4]: Ran on CBS from June 20, 1948 to June 6, 1971. Hosted by Ed Sullivan. Replaced in September 1971 by CBS Sunday Night Movie.
SOURCE [5]: Info about Anne Meara (not directly related to the show's general description, though she is a comedian).
Overview Requirement: 160-220 words summary of the season's narrative arc.
Problem: The synopsis only says "Season 4 is on the 'Toast of the Town' guide." There is no narrative arc provided in the sources. The sources describe the show in general terms (variety show, CBS, Ed Sullivan, vaudeville, rock music), but not the specific plot or narrative arc of Season 4.
Constraint Check: "If a detail is not in the provided material, you omit it rather than guess." "Do not invent plot events or spoilers."
Challenge: I cannot write a 160-220 word summary of a "narrative arc