Here's a short story:

In February 1907, the Royal Dutch Shell Group was created through the amalgamation of two rival companies: the Royal Dutch Petroleum Company of the Netherlands and the "Shell" Transport and Trading Company Ltd of the United Kingdom. It was a move largely driven by the need to compete globally with Standard Oil. The Royal Dutch Petroleum Company was a Dutch company founded in 1890 to develop an oilfield in Sumatra, and initially led by August Kessler, Hugo Loudon, and Henri Deterding. The "Shell" Transport and Trading Company (the quotation marks were part of the legal name) was a British company, founded in 1897 by Marcus Samuel, 1st Viscount Bearsted, and his brother Samuel Samuel. Their father had owned an antique company in Houndsditch, London, which expanded in 1833 to import and sell sea-shells, after which the company "Shell" took its name. 

Shell was vertically integrated and is active in every area of the oil and gas industry, including exploration and production, refining, distribution and marketing, petrochemicals, power generation and trading. It has minor renewable energy activities in the form of biofuels and wind. It has operations in over 90 countries, produces around 3.1 million barrels of oil equivalent per day and has 44,000 service stations worldwide. Shell Oil Company, its subsidiary in the United States, is one of its largest businesses. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What company did Marcus Samuel form?
Guess: the "Shell" Transport and Trading Company

Question: Was it an American company?
Guess: no

Question: What then?
Guess: British

Question: What year was it founded?
Guess: 1897

Question: Did Marcus have a title?
Guess: yes

Question: What was it?
Guess: 1st Viscount

Question: Did he have a sibling?
Guess: yes

Question: Brother or sister?
Guess: brother

Question: And his name?
Guess: Samuel Samuel

Question: How much oil does Shell produce per day?
Guess: 3.1 million barrels

Question: How many of their services stations are there around the world?
Guess: 44,000

Question: In what year was the Shell Group founded?
Guess: 1897

Question: Did Marcus Samuel's father own a company?
Guess: yes

Now answer the following question in the same format.

Question: What sort?

an antique company