Question: Which Maryland Lottery game requires a minimum age of 18 to play at a casino? 

Context paragraphs:
Child labour in Cambodia: Child labour refers to the full-time employment of children under a minimum legal age.  In Cambodia, the state had ratified both the Minimum Age Convention (C138) in 1999 and Worst Forms of Child Labour Convention (C182) in 2006, which are adopted by the International Labour Organization (ILO).  For the former convention, Cambodia had specified the minimum age to work to be at age 14.

Maryland Lottery: The Maryland Lottery is an independent agency of the Maryland government.  Its games include Mega Millions, Powerball, Multi-Match, Keno, Bonus Match 5, and numerous scratch tickets.  The Maryland Lottery is headquartered in Suite 330 at 1800 Washington Boulevard, in Montgomery Business Park, Baltimore.  The minimum age to buy Maryland Lottery tickets is 18; for video lottery, the minimum is 21 (see below for casinos).

Louisiana Lottery Corporation: The Lottery offers full and part-time employment in a total of 6 different cities in the State of Louisiana.  Over half of the Lottery sales are for prize expenses.  Not only does the government receive revenue from the Lottery, but businesses do as well.  The minimum age to purchase a ticket is 21 years olds.  However, to sell or receive a Lottery ticket there is no minimum age.

Minimum Age Convention, 1973: The Convention concerning Minimum Age for Admission to Employment, is an Convention adopted in 1973 by the International Labour Organization.  It requires ratifying states to pursue a national policy designed to ensure the effective abolition of child labour and to raise progressively the minimum age for admission to employment or work.  The convention (number C138 of ILO) replaces several similar ILO conventions in specific fields of labour.

List of countries by minimum driving age: The minimum driving age is the minimum age at which a person may obtain a driver's licence to lawfully drive a motor vehicle on public roads.  That age is determined by and for each jurisdiction and is most commonly set at 18 years of age, but learner drivers may be permitted on the road at an earlier age under supervision.  Before reaching the minimum age for a driver's licence or anytime afterwards, the person wanting the licence would normally be tested for driving ability and knowledge of road rules before being issued with a licence, provided he or she is above the minimum driving age.  Countries with the lowest driving ages (below 17) are Australia, Canada, El Salvador, Iceland, Israel, India, Macedonia, Malaysia, New Zealand, Norway, the Philippines, Russia, Saudi Arabia, Slovenia, Sweden, the United Kingdom (Mainland), United States and Zimbabwe.  In several jurisdictions in the United States and Canada, drivers can be as young as 14.

Private pilot licence: A private pilot licence (PPL) or, in the United States, a private pilot certificate, permits the holder to act as pilot in command of an aircraft privately (not for remuneration).  The licence requirements are determined by the International Civil Aviation Authority (ICAO), but implementation varies widely from country to country.  According to the ICAO, it is obtained by successfully completing a course with at least 40 hours (45 in Europe) of flight time, passing seven written exams, completing a solo cross country flight (minimum cumulative solo flight time is 10 hours), and successfully demonstrating flying skills to an examiner during a flight test (including an oral exam).  In the United States, pilots can be trained under Title 14 of federal code part 141, which allows them to apply for their certificate after as few as 35 hours.  However, most pilots require 60–70 hours of flight time to complete their training.  The minimum age for a student pilot certificate is 14 for balloons and gliders, and 16 for powered flight (airplanes, helicopters, and gyroplanes).  The minimum age for a private pilot certificate is 16 for balloons and gliders, and 17 for powered flight (airplanes, helicopters, and gyroplanes).  Pilots can begin training at any age and can solo balloons and gliders from age 14, and powered aircraft from age 16.

Amethyst Initiative: The Amethyst Initiative is an organization made up of U.S. college presidents and chancellors that in July 2008 launched a movement calling for the reconsideration of U.S. legal drinking age, particularly the minimum age of 21.  The National Minimum Drinking Age Act of 1984 requires all US states to raise their minimum age for purchase and public possession of alcohol to 21 or face a reduction in highway funds under the Federal-Aid Highway Act.  The Amethyst Initiative was initiated by John McCardell, founder of Choose Responsibility, a former professor of history at Middlebury College in Middlebury, Vermont and current Vice-Chancellor of , and is currently supported by 136 college presidents who signed a statement proclaiming, "It’s time to rethink the drinking age".

Smoking age: The smoking age is the minimum legal age required to purchase or smoke tobacco products.  Most countries have laws that restrict those below a minimum age from legally purchasing tobacco products.  However, many of these countries do not require a minimum age for smoking in public.

Virgin Islands Lottery (US): A lottery exists within the United States Virgin Islands, the only US lottery outside the mainland and Puerto Rico.  It was established in 1937 and became an independent agency of the territorial government in 1971.  The USVI is a member of the Multi-State Lottery Association (MUSL).  It is the smallest US lottery to offer either Powerball, Mega Millions or scratchcard games.  The USVI Lottery is also a member of the Caribbean Lottery, in which other islands, such as Sint Maarten, Saint Kitts and Nevis, and Barbados, participate.  Minimum age to play the Virgin Islands Lottery is 18.

Keno: Keno is a lottery-like gambling game often played at modern casinos, and also offered as a game in some lotteries.

Supporting paragraphs: Maryland Lottery Keno
Answer: Keno