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:
| Employee Group | Approximate Number of Employees | Representatives | Amendable Date |
| --- | --- | --- | --- |
| Southwest Flight Attendants | 16,000 | Transportation Workers of America, AFL-CIO, Local 556 ("TWU 556") | November 2018 |
| Southwest Customer Service Agents, Customer Representatives, and Source of Support Representatives | 7,200 | International Association of Machinists and Aerospace Workers, AFL-CIO ("IAM 142") | December 2018 |
| Southwest Dispatchers | 400 | Transportation Workers of America, AFL-CIO, Local 550 ("TWU 550") | June 2019 |
| Southwest Flight Crew Training Instructors | 130 | Transportation Workers of America, AFL-CIO, Local 557 ("TWU 557") | January 2020 |
| Southwest Meteorologists | 10 | TWU 550 | June 2019 |
Question:
how many dispatchers are part of the Southwest dispatchers employee group in 2019?
Answer:
400