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 |
| --- | --- | --- | --- | --- | --- |
| Massachusetts 1 | John W. Heselton | Republican | 1944.0 | Re-elected | John W. Heselton (R) 55.6% John J. Dwyer (D) 44.4% |
| Massachusetts 3 | Philip Philbin | Democratic | 1942.0 | Re-elected | Philip Philbin (D) Unopposed |
| Massachusetts 5 | Edith Nourse Rogers | Republican | 1925.0 | Re-elected | Edith Nourse Rogers (R) Unopposed |
| Massachusetts 7 | Thomas J. Lane | Democratic | 1941.0 | Re-elected | Thomas J. Lane (D) Unopposed |
| Massachusetts 11 | Tip O'Neill | Democratic | 1952.0 | Re-elected | Tip O'Neill (D) 78.2% Charles S. Bolster (R) 21.8% |
Question:
Thomas J. Lane is the incumbent of how many parties?
Answer:
1.0