which mentioned vs that mentioned

Some examples from the web:

• Nothing apart from a recital which mentioned the recycling society without going into further detail.
• The Council therefore also deleted recital 13 and Articles 4(d) and 9(6) of the Commission's amended proposal which mentioned one specific organisation.
• The statement on the closure of Guantánamo Bay, which mentioned deepening transatlantic cooperation on justice and home affairs, is an important step in this direction.
• By letter of 14 September 2006, which mentioned the said e-mail and the attached letters, Belgium stated that it had never received the letters.
• This directive was introduced to take account of the European Parliament's Valverde López report of 1997 which mentioned many of the elements of the present text and called for a proposal from the Commission.
• A statement on Nasrin Sotoudeh's case was made by High Representative and Vice-President Ashton on 14 January 2011, which mentioned both Ms Sotoudeh and Ms Shiva Nazar Ahari, a lawyer and a journalist, sentenced respectively to eleven and four years in prison.
• The energy supply problems in the region are well known and are referred to in the Commission's 2008 Progress Report on Kosovo, which mentioned, inter alia, the obstacles created by legal uncertainty relating to the issue of final status.
• Advertising which mentioned the (regional) origin of the product as a subsidiary message was deemed not to infringe Article 28 EC (now Article 34 TFEU).
• It is, however, very important to emphasise German responsibility for the Holocaust, especially since we have reports such as that in yesterday's, which mentioned Polish gas chambers and crematoria - gas chambers and crematoria!
• I have heard many comments on the Commission's opinion, which mentioned all these subjects and dealt with many of them in depth, with specific indications of new draft articles, but no one has said that we were going beyond the Helsinki mandate.

Some examples from the web:

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