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:
| Antibody | Brand name | Approval date | Type | Target |
| --- | --- | --- | --- | --- |
| Alemtuzumab | Campath | 2001.0 | humanized | CD52 |
| Bevacizumab | Avastin | 2004.0 | humanized | vascular endothelial growth factor |
| Brentuximab vedotin | Adcetris | 2011.0 | chimeric | CD30 |
| Cetuximab | Erbitux | 2004.0 | chimeric | epidermal growth factor receptor |
| Gemtuzumab ozogamicin | Mylotarg | 2000.0 | humanized | CD33 |
| Ibritumomab tiuxetan | Zevalin | 2002.0 | murine | CD20 |
| Panitumumab | Vectibix | 2006.0 | human | epidermal growth factor receptor |
| Rituximab | Rituxan, Mabthera | 1997.0 | chimeric | CD20 |
| Trastuzumab | Herceptin | 1998.0 | humanized | ErbB2 |
Question:
What's the target of the antibody rituximab?
Answer:
CD20