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:
| Year | English Title | Chinese Title | Director | Role |
| --- | --- | --- | --- | --- |
| 1933 | Twenty-Four Hours in Shanghai | 上海二十四小时 | Shen Xiling |  |
| 1937 | Street Angel | 马路天使 | Yuan Muzhi | Xiao Chen |
| 1937 | Crossroads | 十字街头 | Shen Xiling | Zhao |
| 1947 | Far Away Love | 遙遠的愛 | Chen Liting | Xiao Yuanxi |
| 1947 | Rhapsody of Happiness | 幸福狂想曲 | Chen Liting |  |
| 1949 | Crows and Sparrows | 烏鴉与麻雀 | Zheng Junli | Little Broadcast |
| 1949 | Women Side by Side | 丽人行 | Chen Liting | Zhang Yuliang |
| 1950 | The Life of Wu Xun | 武训传 | Sun Yu | Wu Xun |
| 1951 | The Married Couple | 我们夫妇之间 | Zheng Junli |  |
| 1956 | Li Shizhen | 李时珍 | Shen Fu | Li Shizhen |
| 1958 | Lin Zexu | 林则徐 | Zheng Junli | Lin Zexu |
| 1959 | Nie Er | 聂耳 | Zheng Junli | Nie Er |
Question:
how many films did zhao dan star in before 1949?
Answer:
5