It was unclear to what hospital in London the president was referring when he spoke Friday.
It is unclear to whom Cameron was referring when he was talking about book promotion as he did not mention any names.
It was not exactly clear to whom Kraft was referring, when, this week, he said to reporters, "Jealousy and envy are incurable diseases".
And though she never mentioned any company by name, it was clear to what she was referring when she cited the only company in European antitrust enforcement history that has been fined for refusing to comply with orders -- Microsoft.
Indeed, it is sometimes forgotten that no medical practitioner is obliged to work only for the NHS (part of the deal to which Aneurin Bevan was referring when he declared he had "stuffed their mouths with gold" back in 1948).
Those headline figures draw the focus, the sums to which the Palace manager, Ian Holloway, was referring when failing to contain his enthusiasm ahead of his third play-off final in four years.
The assessment results could be referred when selecting building energy saving technologies in the design stage.
The chaplain also maintains an active list of therapists, pastoral counselors, spiritual directors, and local congregations and clergy to whom students can be referred when necessary.
The first level is whether patient is diagnosed correctly, while the second level is, if diagnosed correctly, whether the patient is referred when they need to be referred.
It might be speculated that this poor referral rate was due to patients refusing to be referred when offered this option by their GPs.
