I have a table with 153 rows by 9 columns. My interest is the character string in the first column, I want to extract the fourth word and create a new list from this fourth word, this list will be 153 rows, 1 column.

An example of the first two rows of column 1 of this database table:

```
[1] Resistance_Test DevID (Ohms) 428
[2] Diode_Test SUBLo (V) 353

```

"Words" are separated by spaces, so the fourth word of the first row is "428" and the fourth word of the second row is "353". How can I create a new list containing the fourth word of all 153 rows?