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:
| District | Incumbent | Party | First elected | Result | Candidates |
| --- | --- | --- | --- | --- | --- |
| California 7 | George Miller | Democratic | 1974.0 | Re-elected | George Miller (D) 68.3% Rick Tubbs (R) 31.7% |
| California 15 | Mike Honda | Democratic | 2000.0 | Re-elected | Mike Honda (D) 67.6% Scott Kirkland (R) 32.4% |
| California 20 | Jim Costa | Democratic | 2004.0 | Re-elected | Jim Costa (D) 51.7% Andy Vidak (R) 48.3% |
| California 21 | Devin Nunes | Republican | 2000.0 | Re-elected | Devin Nunes (R) unopposed |
| California 22 | Kevin McCarthy | Republican | 2006.0 | Re-elected | Kevin McCarthy (R) 98.8% John Uebersax (W/I) 1.2% |
| California 24 | Elton Gallegly | Republican | 1986.0 | Re-elected | Elton Gallegly (R) 59.9% Timothy Allison (D) 40.1% |
| California 25 | Howard McKeon | Republican | 1992.0 | Re-elected | Howard McKeon (R) 61.8% Jackie Conaway (D) 38.2% |
| California 27 | Brad Sherman | Democratic | 1996.0 | Re-elected | Brad Sherman (D) 65.2% Mark Reed (R) 34.8% |
| California 32 | Judy Chu | Democratic | 2009.0 | Re-elected | Judy Chu (D) 71.0% Ed Schmerling (R) 29.0% |
| California 38 | Grace Napolitano | Democratic | 1998.0 | Re-elected | Grace Napolitano (D) 73.5% Robert Vaughn (R) 26.5% |
| California 40 | Ed Royce | Republican | 1992.0 | Re-elected | Ed Royce (R) 66.8% Christina Avalos (D) 33.2% |
| California 43 | Joe Baca | Democratic | 1999.0 | Re-elected | Joe Baca (D) 65.5% Scott Folkens (R) 34.5% |
Question:
What district did George Miller belong to?
Answer:
California 7