Post reference: https://powershell.org/forums/topic/find-a-number-after-a-sentence/

powershell-forum-find-a-number-after-a-sentence-reply-02.ps1

# Option 1: Access the capture group (\d+) by number.
if ($Event[0].Message -match 'sequence number (\d+)')
{
    $Number = $Matches[1]
}

# Option 2: Access the number using the named capture group "Number"
if ($Event[0].Message -match 'sequence number (?<Number>\d+)')
{
    $Number = $Matches.Number
}