Give you a statement and table with its title, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a ternary classification problem, you should choose the answer among supported, refuted and neutral. Table cells in one row are seperated by '|', and different rows are seperated by '
'. If cell value is a list, we use '	' to seperate each list element.

Table:
| Wine type | DOCG |
| Decree of institution | 26 June 1974 as DOC ,  1998 as DOCG |
| Gazzetta Ufficiale | 12 November 1974 n. 73 |
| Yield | 100 quintals per hectare |
| Maximum grape yield | 70.0% |
| Alcohol by volume of grape (natural) | 10% |
| Alcohol by volume of wine (minimum) | 10.5% |
| Net dry extract (minimum) | 15.0‰ |
| Origin | Province of Alessandria, around Gavi |
| Ingredient grapes | Cortese: 100.0% |
Title:
Cortese di Gavi
Statement:
Cortese grapes are the main species of grape used in most well known wines.
Answer:
neutral