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:
| Date | Tournament | Winner | Purse ($) | Notes |
| --- | --- | --- | --- | --- |
| 25 Feb | Pinamar Open | Miguel Rodriguez | 70,000 |  |
| 3 Mar | South Open | Rafael Gómez | 100,000 |  |
| 10 Mar | Parana Open | Julio Zapata | 70,000 |  |
| 8 Apr | Norpatagonico Open | Luciano Dodda (amateur) |  | PGA Argentina- No valid TPG |
| 15 Apr | Center Open | Ángel Cabrera | 200,000 | Co-sanctioned by the TLA |
| 22 Apr | Ángel Cabrera Classic | Rafael Gómez | 120,000 |  |
| 29 Apr | Chaco Open | Fabián Gómez | 70,000 |  |
| 9 Jun | North Open | Ricardo González, Andrés Romero (tie) | 80,000 |  |
| 10 Jul | Metropolitano Open | José Cóceres |  | PGA Argentina- No valid TPG |
| 11 Aug | Misiones Open | Sergio Acevedo | 70,000 |  |
| 19 Aug | Carlos Franco Invitational | Marco Ruiz | 93,000 |  |
| 29 Sep | Salta Open | Andrés Romero | 80,000 |  |
| 7 Oct | Tandil Open | Diego Ortiz | 70,000 |  |
| 27 Oct | Argentine Masters | Ángel Cabrera | 420,000 | Co-sanctioned by the TLA |
| 4 Nov | Mendoza Open | Rafael Echenique | 80,000 |  |
| 11 Nov | Roberto de Vicenzo Classic | Miguel Guzmán | 120,000 |  |
| 25 Nov | San Luis Open | Emilio Dominguez | 450,000 | Co-sanctioned by the TLA |
| 2 Dec | Abierto del Litoral | Miguel Rodriguez | 520,000 | Co-sanctioned by the TLA and Challenge Tour |
| 9 Dec | Argentine Open | Marco Ruiz | 600,000 | Co-sanctioned by the TLA and Challenge Tour |
Question:
how many tournaments were held in april?
Answer:
4