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:
|  |  | Class or Craft | Employees  (1) | Contract Amendable Date |
| --- | --- | --- | --- | --- |
| Mainline: (2) | Allied Pilots Association (APA) | Pilots | 13,200 | 2020 |
| Mainline: (2) | Association of Professional Flight Attendants (APFA) | Flight Attendants | 24,900 | 2019 |
| Mainline: (2) | Airline Customer Service Employee Association \u2013Communications Workers of America and International Brotherhood of Teamsters (CWA-IBT) | Passenger Service | 16,000 | 2020 |
| Mainline: (2) | Transport Workers Union and International Association of Machinists & Aerospace Workers (TWU-IAM Association) | Mechanics and Related | 12,400 | 2018 |
| Mainline: (2) | TWU-IAM Association | Fleet Service | 16,700 | 2018 |
| Mainline: (2) | TWU-IAM Association | Stock Clerks | 1,900 | 2018 |
| Mainline: (2) | TWU-IAM Association | Flight Simulator Engineers | 150 | 2021 |
| Mainline: (2) | TWU-IAM Association | Maintenance Control Technicians | 200 | 2018 |
| Mainline: (2) | TWU-IAM Association | Maintenance Training Instructors | 50 | 2018 |
| Mainline: (2) | TWU (Transport Workers Union) | Dispatchers | 450 | 2021 |
| Mainline: (2) | TWU | Flight Crew Training Instructors | 300 | 2021 |
| Envoy: (3) | Air Line Pilots Associations (ALPA) | Pilots | 2,200 | 2024 |
| Envoy: (3) | Association of Flight Attendants-CWA (AFA) | Flight Attendants | 1,300 | 2020 |
| Envoy: (3) | TWU | Ground School Instructors | 10 | 2019 |
| Envoy: (3) | TWU | Mechanics and Related | 1,300 | 2020 |
| Envoy: (3) | TWU | Stock Clerks | 150 | 2020 |
| Envoy: (3) | TWU | Fleet Service Clerks | 3,500 | 2019 |
| Envoy: (3) | TWU | Dispatchers | 60 | 2019 |
| Envoy: (3) | Communications Workers of America (CWA) | Passenger Service | 4,300 | Initial Contract  in Negotiation |
| Piedmont: (3) | ALPA | Pilots | 550 | 2024 |
| Piedmont: (3) | AFA | Flight Attendants | 300 | 2019 |
| Piedmont: (3) | International Brotherhood of Teamsters (IBT) | Mechanics | 350 | 2021 |
| Piedmont: (3) | IBT | Stock Clerks | 50 | 2021 |
| Piedmont: (3) | CWA | Fleet and Passenger Service | 3,400 | 2017 |
| Piedmont: (3) | IBT | Dispatchers | 20 | 2019 |
| Piedmont: (3) | ALPA | Flight Crew Training Instructors | 40 | 2024 |
| PSA: (3) | ALPA | Pilots | 1,500 | 2023 |
| PSA: (3) | AFA | Flight Attendants | 1,000 | 2017 |
| PSA: (3) | International Association of Machinists & Aerospace Workers (IAM) | Mechanics | 350 | 2016 |
| PSA: (3) | TWU | Dispatchers | 50 | 2022 |
Question:
How many maintenance and Training technicians does American Airlines have for the mainline with contract amendable date as 2018?
Answer:
50