Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Venue | Location | Capacity | Owner | Environment | Year Built |
| --- | --- | --- | --- | --- | --- |
| Bank of America Stadium | Uptown Charlotte | 73,778 | Carolina Panthers | Open air, natural grass | 1996 |
| Time Warner Cable Arena | Uptown Charlotte | 20,200 | City of Charlotte | Indoor arena | 2005 |
| American Legion Memorial Stadium | Elizabeth, Charlotte | 16,000 | Mecklenburg Parks & Rec. | Open air, natural grass | 1936 |
| Bojangles' Coliseum | Coliseum Drive, Charlotte | 9,605 | City of Charlotte | Indoor arena | 1955 |
| Jerry Richardson Stadium | University City, Charlotte | 15,314 | UNC Charlotte | Open air, artificial turf | 2012 |
| Charlotte Motor Speedway | Concord, NC | 140,000+ | Speedway Motorsports | Open air, asphalt | 1960 |
| Dale F. Halton Arena | University City, Charlotte | 9,105 | UNC Charlotte | Indoor arena | 1996 |
| John M. Belk Arena | Davidson, NC | 5,223 | Davidson College | Indoor arena | 1989 |
| Transamerica Field | University City, Charlotte | 4,000 | UNC Charlotte | Open air, natural grass | 1996 |
| Richardson Stadium | Davidson, NC | 6,000 | Davidson College | Open air, artificial turf | 1923 |
| Irwin Belk Complex | Biddleville, Charlotte | 4,500 | Johnson C. Smith University | Open air, natural grass | 2003 |
| Winthrop Coliseum | Rock Hill, SC | 6,100 | Winthrop University | Indoor arena | 1982 |
| Knights Stadium | Fort Mill, SC | 10,002 | York County, SC | Open air, natural grass | 1990 |
| Concord Speedway | Midland, NC | 8,000 | Concord Speedway | Open air, asphalt | 1956? |
Question:
What type of environment is the venue that was built in 2003?
Answer:
Open air, natural grass