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 | Elected | Status | Opponent |
| --- | --- | --- | --- | --- | --- |
| Washington1 | John Miller | Republican | 1984.0 | Re-elected | John Miller (R) 52.0% Cynthia Sullivan (D) 48.0% |
| Washington3 | Jolene Unsoeld | Democratic | 1988.0 | Re-elected | Jolene Unsoeld (D) 53.8% Robert Williams (R) 46.2% |
| Washington4 | Sid Morrison | Republican | 1980.0 | Re-elected | Sid Morrison (R) 70.7% Ole H. Hougen (D) 29.3% |
| Washington5 | Tom Foley | Democratic | 1964.0 | Re-elected | Tom Foley (D) 68.8% Marlyn Derby (R) 31.2% |
| Washington6 | Norman D. Dicks | Democratic | 1976.0 | Re-elected | Norman D. Dicks (D) 61.4% Norman Mueller (R) 38.6% |
Question:
How many parties is Tom Foley a member of?
Answer:
1.0