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 | Part 1 | Part 2 | Part 3 | Part 4 | Verb meaning |
| --- | --- | --- | --- | --- | --- |
| 1 | rīdan | rād | ridon | riden | to ride |
| 2a | frēosan | frēas | fruron | froren | to freeze |
| 2b | lūcan | lēac | lucon | locen | to lock |
| 3a | bindan | band | bundon | bunden | to bind |
| 3b | weorþan | wearþ | wurdon | worden | to become |
| 4 | beran | bær | bǣron | boren | to bear |
| 5 | lesan | læs | lǣron | leren | to gather |
| 6 | alan | ōl | ōlon | alen | to nourish, to grow |
| 7a | hātan | hēt | hēton | hāten | to call, to be called |
| 7b | hlēapan | hlēop | hlēppon | hlēapen | to leap |
| 7c | healdan | hēold | hēoldon | healden | to hold |
| 7d | rǣdan | rēd | rēdon | rǣden | to advise, to interpret |
| 7e | blōtan | blēot | blēoton | blōten | to sacrifice |
Question:
What is the class when the verb meaning is to nourish, to grow?
Answer:
6.0