Please answer the following question: Information: - Interstate285 (I-285) is an Interstate Highway loop encircling Atlanta, Georgia, for . I-285 also carries unsigned State Route407 (SR407), and is colloquially referred to as The Perimeter. Suburban sprawl has made it one of the most heavily-traveled roadways in the United States, and portions of the highway slow, sometimes to a crawl, during rush hour. It is also signed as Atlanta Bypass on I-75/I-85. - The Cobb Galleria Centre is a meeting and convention center and a shopping center in the Cumberland/Galleria district of Cobb County, in northwest Atlanta, Georgia, in the United States. It is also located next to a cluster of mid-rise office buildings, the Cumberland Mall and the Cobb Energy Performing Arts Centre. It has hosted over 15,000 events and millions of guests. The venue operates under the direction of the Cobb-Marietta Coliseum and Exhibit Hall Authority and is located at the intersection of three major highways: Interstate 75, Interstate 285, and Cobb Parkway (U.S. 41) just northwest of the city. The Galleria Specialty Mall, which pre-dates the convention center, is located downstairs, with meeting halls upstairs. - In a meeting, two or more people come together to discuss one or more topics, often in a formal setting. - Cobb Galleria is a large office park with six skyscrapers located in the Cumberland / Vinings district of Cobb in the U.S. state of Georgia and sandwiched between Marietta , Smyrna , Sandy Springs , and Atlanta . It is near many hotels and parks , the Cumberland Mall ( accessible by a pedestrian bridge ) , the Cobb Galleria Centre , the Cobb Energy Performing Arts Center and the intersections of I - 75 , and I - 285 . It also adjoins other large business and residential districts , including the Vinings Overlook and Circle 75 . - A convention center (American English; conference centre outside the USA) is a large building that is designed to hold a convention, where individuals and groups gather to promote and share common interests. Convention centers typically offer sufficient floor area to accommodate several thousand attendees. Very large venues, suitable for major trade shows, are sometimes known as exhibition centres. Convention centers typically have at least one auditorium and may also contain concert halls, lecture halls, meeting rooms, and conference rooms. Some large resort area hotels include a convention center. - The Cobb Energy Performing Arts Centre is a performing arts venue located in the Cumberland/Galleria edge city, just northwest of Atlanta, Georgia. The $145 million facility celebrated its grand opening September 15, 2007, with a concert by Michael Feinstein and Linda Eder. - Cumberland Mall, located in the Cumberland district of Metropolitan Atlanta near the suburbs of Smyrna and Vinings, opened on August 8, 1973 and was the largest mall in Georgia, United States, when it first opened. Given the information, choose the subject and object entities that have the relation of 'instance of'.
A:
cobb galleria , convention center