Given a DataFrame `df` with a column `description` containing strings, how would you extract the first word from this column using Spark? Provide the code snippet.

Simulated

df.withColumn('first_word', split(col('description'), ' ')[0])_

55.3%

df.select(split(col('description'), ' ')[0])

20.8%

df.withColumn('first_word', substring(col('description'), 0, indexOf(col('description'), ' ')))_

10.7%

df.select(substring(col('description'), 0, indexOf(col('description'), ' ')))

13.2%

Databricks Certified Data Engineer - Associate