Some examples and use cases from the internet:

Some examples and use cases from the internet:

• This Dr. Grey is an expert on...
• Nell is an expert on South America.
• Ness is an expert on Barbosa.
• Paul is an expert on French wine.
• Dr. Mason is an expert on theories of extraterrestrial life.
• Tom is an expert on the subject.
• But we have somebody here who is an expert on weapons.
• The former mayor of Strasbourg is an expert on all this.

• Mr Vladimír ?mejla is an expert in economics, patents and inventions.
• Alberto is an expert in the disposal business.
• All we need now is an expert in gibberish.
• He is an expert in covert operations.
• Daniel Faraday is an expert in physics.
• Nell is an expert in the field of radio controlled aircraft.
• Goodman is an expert in religious iconography.
• Dr Madden is an expert in this area.