re = /(?<=\()(.*), .*, .*\d+, \d{4}(?=\))/mi
str = 'Yuta Taki (滝 裕太, Taki Yuta, born August 29, 1999) is a Japanese football player.
Yuta Taki (John Smith, Taki Yuta, born August 29, 1999) is a Japanese football player.'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html