Who is the executive chair of Alphabet Inc.?
As of September 2021, the executive chairman of Alphabet Inc. (the parent company of Google) is John L. Hennessy.
Complete the following task based on the instruction and optional input provided.### Instruction:
Who is the executive chair of Alphabet Inc.?

### Output:
As of September 2021, the executive chairman of Alphabet Inc. (the parent company of Google) is John L. Hennessy.