system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
"""
Print Name 165 Butler Drive ____________________________ Ridgeland, MS 39154 ____________________________ Address [add below the signatures of all registered owners of shares deemed beneficially owned by the affiliate] ___________________________ Name: ___________________________ Name: ___________________________ Name: AGREED TO AND ACCEPTED as of December 14, 1997 PHYSICIAN SALES & SERVICE, INC. /s/ David A. Smith BY:_________________________ -4- This Affiliate Agreement is executed as of the 14th day of December, 1997. Very truly yours, /s/ Steve Richardson ___________________________ Signature Steve Richardson ___________________________ Print Name 194 Sunsan Road ____________________________ Madison, MS 39116 ____________________________ Address [add below the signatures of all registered owners of shares deemed beneficially owned by the affiliate] ___________________________ Name: ___________________________ Name: ___________________________ Name: AGREED TO AND ACCEPTED as of December 14, 1997 PHYSICIAN SALES & SERVICE, INC. /s/ David A. Smith BY:_________________________ -4- This Affiliate Agreement is executed as of the 14th day of December, 1997. Very truly yours, /s/ Guy W. Edwards ___________________________ Signature Guy W. Edwards ___________________________ Print Name 567 Arbor Drive ____________________________ Madison, MS 39110 ____________________________ Address [add below the signatures of all registered owners of shares deemed beneficially owned by the affiliate] ___________________________ Name: ___________________________ Name: ___________________________ Name: AGREED TO AND ACCEPTED as of December 14, 1997 PHYSICIAN SALES & SERVICE, INC. /s/ David A. Smith BY:_________________________ -4- This Affiliate Agreement is executed as of the 14th day of December, 1997. Very truly yours, /s/ Stanton Keith Pritchard ___________________________ Signature Stanton Keith Pritchard ___________________________ Print Name #3 Abbey Nord ____________________________ Jackson, MS 39216 ____________________________ Address [add below the signatures of all registered owners of shares deemed beneficially owned by the affiliate] ___________________________ Name: ___________________________ Name: ___________________________ Name: AGREED TO AND ACCEPTED as of December 14, 1997 PHYSICIAN SALES & SERVICE, INC. /s/ David A. Smith BY:_________________________ -4- This Affiliate Agreement is executed as of the 14th day of December, 1997. Very truly yours, /s/ Louie Vaughan ___________________________ Signature Louie Vaughan ___________________________ Print Name 318 Woodrun Drive ____________________________ Ridgeland, MS 39157 ____________________________ Address [add below the signatures of all registered owners of shares deemed beneficially owned by the affiliate] ___________________________ Name: ___________________________ Name: ___________________________ Name: AGREED TO AND ACCEPTED as of December 14, 1997 PHYSICIAN SALES & SERVICE, INC. /s/ David A. Smith BY:_________________________ -4-
"""

Extract the exact clause related to "Ip Ownership Assignment" from the excerpt above.

assistant: Not found.