In the code cell below, complete function tableRowCounter take the parameter s which is a string of HTML as input and returns the number of rows in the first table of s. The row that contains the table header should not be counted.

Here's the code for the function:

from bs4 import BeautifulSoup

def tableRowCounter(s):
    soup = BeautifulSoup(s, 'html.parser')
    table = soup.find('table')
    rows = table.find_all('tr')
    
    # Ignore the first row if it contains th tags
    if rows[0].find('th'):
        rows = rows[1:]
    
    return len(rows)

Explanation:

1. We first import the BeautifulSoup library to parse the HTML string.
2. We create a BeautifulSoup object called soup from the input string s using the 'html.parser' parser.
3. We find the first table element in the HTML using the `find()` method of the soup object.
4. We find all the rows in the table using the `find_all()` method of the table object.
5. If the first row of the table contains th tags (i.e., it is a table header row), we ignore it by slicing the rows list.
6. Finally, we return the length of the remaining rows list as the number of rows in the table (excluding the header row).