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 | Status | Opponent |
| --- | --- | --- | --- | --- | --- |
| Massachusetts1 | John Olver | Democratic | 1991.0 | Re-elected | John Olver (D) unopposed |
| Massachusetts4 | Barney Frank | Democratic | 1980.0 | Re-elected | Barney Frank (D) unopposed |
| Massachusetts5 | Marty Meehan | Democratic | 1992.0 | Re-elected | Marty Meehan (D) 69.8% David E. Coleman (R) 30.1% |
| Massachusetts7 | Ed Markey | Democratic | 1976.0 | Re-elected | Ed Markey (D) 64.4% Brad Bailey (R) 35.5% |
| Massachusetts8 | Joe Kennedy | Democratic | 1986.0 | Re-elected | Joe Kennedy (D) unopposed |
Question:
What parties are represented in Massachusetts4 district?
Answer:
Democratic