You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What group was the heir to Walter L. Morgan at Wellington Management Company founder of?" whose answer is The Vanguard Group.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Heir to Walter L. Morgan Wellington Management Company
Useful Output:

Doc 1: Bogle was hired by Walter L. Morgan, founder of the Wellington Fund, a Philadelphia-based fund management company. Mr. Morgan had read Mr.
Doc 2: Mr. Morgan hired the ambitious 22-year-old for his Philadelphia-based investment management firm, Wellington Management Company. Mr. Bogle
Doc 3: Important Note: This page contains Division of Investment Management no-action letters dated on or after January 1, 1993.
Doc 4: Wellington Management Group Llp has disclosed 1,927 total holdings in their latest SEC filings. Most recent portfolio value is calculated to be
Doc 5: Wellington Management is a private, global investment management firm offering equity, fixed income, multi-asset, alternative, private markets,