import re
regex = r"(NP_\w+)(?: \([^()]+\))? is (NP_\w+)"
test_str = "NP_The_Eleventh_Air_Force is NP_a_Numbered_Air_Force of NP_the_United_States_Air_Force_Pacific_Air_Forces (NP_PACAF)."
matches = re.search(regex, test_str)
if matches:
print(matches.group(1))
print(matches.group(2))
aW1wb3J0IHJlCgpyZWdleCA9IHIiKE5QX1x3KykoPzogXChbXigpXStcKSk/IGlzIChOUF9cdyspIgp0ZXN0X3N0ciA9ICJOUF9UaGVfRWxldmVudGhfQWlyX0ZvcmNlIGlzIE5QX2FfTnVtYmVyZWRfQWlyX0ZvcmNlIG9mIE5QX3RoZV9Vbml0ZWRfU3RhdGVzX0Fpcl9Gb3JjZV9QYWNpZmljX0Fpcl9Gb3JjZXMgKE5QX1BBQ0FGKS4iCm1hdGNoZXMgPSByZS5zZWFyY2gocmVnZXgsIHRlc3Rfc3RyKQoKaWYgbWF0Y2hlczoKICAgIHByaW50KG1hdGNoZXMuZ3JvdXAoMSkpCiAgICBwcmludChtYXRjaGVzLmdyb3VwKDIpKQ==