Question: Who is the Apple Sr. VP of Software Engineering that introduced Face ID, a facial recognition system for iPhone X, at the Steve Jobs Theater on September 12, 2017?

Context paragraphs:
Craig Federighi: Craig Federighi (born May 27, 1969) is Apple's senior vice president of Software Engineering.  Federighi oversees the development of iOS, macOS and Apple's common operating system engineering teams.  His teams are responsible for delivering the software at the heart of Apple's products, including the user interface, applications and frameworks.

IPhone X: iPhone X (X pronounced "ten" ) is a phablet designed, developed, and marketed by Apple Inc. Apple CEO Tim Cook announced the iPhone X on September 12, 2017, alongside the iPhone 8 and iPhone 8 Plus at the Steve Jobs Theater in the Apple Park campus.  The phone is slated for release on November 3, 2017.  This iPhone marks the iPhone's tenth anniversary, with "X" being the symbol for "ten" in Roman numerals.

Apple A11: The Apple A11 Bionic is a 64-bit ARM-based system on a chip (SoC), designed by Apple Inc. and manufactured by TSMC.  It first appeared in the iPhone 8, iPhone 8 Plus, and iPhone X which were introduced on September 12, 2017.  It has two high-performance cores which are 25% faster than the Apple A10 and four high-efficiency cores which are up to 70% faster than the energy-efficient cores in the A10.

List of mergers and acquisitions by Apple: Apple Inc. is an American multinational corporation that designs and manufactures consumer electronics and software products.  It was established in Cupertino, California, on April 1, 1976, by Steve Jobs, Steve Wozniak, and Ronald Wayne, and was incorporated on January 3, 1977.  The company's hardware products include the Macintosh line of personal computers, the iPod line of portable media players, the iPad line of tablets, the iPhone line of smartphones, the Apple TV line of digital media players, and the Apple Watch line of smartwatches.  Apple's software products include the OS X operating system, the iOS mobile operating system, the tvOS operating system, the watchOS operating system, the iTunes media browser, and the iLife suite of multimedia and creativity software.  As of 2017 , Apple is publicly known to have acquired 70 companies.  The actual number of acquisitions is possibly larger as Apple does not reveal the majority of its acquisitions unless discovered by journals.  Apple has also purchased stakes in two companies, as well as made two divestments. Apple has not released the financial details for the majority of its mergers and acquisitions.

FERET database: The FERET database is a dataset used for facial recognition system evaluation.  The Face Recognition Technology (FERET) program is managed by the Defense Advanced Research Projects Agency (DARPA) and the National Institute of Standards and Technology (NIST).  A database of facial imagery was collected between December 1993 and August 1996.  In 2003 DARPA released a high-resolution, 24-bit color version of these images.  The dataset tested includes 2,413 still facial images, representing 856 individuals.

DeepFace: DeepFace is a deep learning facial recognition system created by a research group at Facebook.  It identifies human faces in digital images.  It employs a nine-layer neural net with over 120 million connection weights, and was trained on four million images uploaded by Facebook users.  The system is said to be 97% accurate, compared to 85% for the FBI's Next Generation Identification system.  One of the creators of the software, Yaniv Taigman, came to Facebook via their 2007 acquisition of Face.com.

Face ID: Face ID is a facial recognition system, designed and released by Apple Inc. and will be included in the iPhone X.  It was introduced on September 12, 2017 at the Steve Jobs Theater by Phil Schiller and Craig Federighi.

IPhone 8: iPhone 8 and iPhone 8 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 12, 2017, alongside the higher-end iPhone X at the Steve Jobs Theater in the Apple Park campus by Apple CEO Tim Cook, succeeding the iPhone 7 and iPhone 7 Plus.  They were released on September 22, 2017.

IPhone 7: iPhone 7 and iPhone 7 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 7, 2016, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, and were released on September 16, 2016, succeeding the iPhone 6S and iPhone 6S Plus as the flagship devices in the iPhone series.  Apple also released the iPhone 7 and 7 Plus in numerous countries worldwide throughout September and October 2016.  They were succeeded as flagship devices by the iPhone 8 and iPhone 8 Plus on September 22, 2017 and the upcoming iPhone X on November 3, 2017.

IPhone 5: The iPhone 5 is a smartphone designed and marketed by Apple Inc. It is the sixth generation of the iPhone, succeeding the iPhone 4S and preceding the iPhone 5S and iPhone 5C.  Formally unveiled as part of a press event on September 12, 2012, it was released on September 21, 2012.  It was the first iPhone to be completely developed under the guidance of Tim Cook and the last iPhone to be overseen by Steve Jobs.

Supporting paragraphs: Face ID Craig Federighi
Answer: Craig Federighi