Solve the following sql problem:
How many times was Ian Maxtone-Graham nominated for an award in Writers Guild of America, USA?

Schema:
SCHEMA:
- Table: Episode
  - Column: episode_id
    - Samples: [S20-E1, S20-E2, S20-E3, S20-E4, S20-E5]
  - Column: season
    - Samples: [20, 20, 20, 20, 20]
  - Column: episode
    - Samples: [1, 2, 3, 4, 5]
  - Column: number_in_series
    - Samples: [421, 422, 423, 424, 425]
  - Column: title
    - Samples: [Sex, Pies and Idiot Scrapes, Lost Verizon, Double, Double, Boy in Trouble, Treehouse of Horror XIX, Dangerous Curves]
  - Column: summary
    - Samples: [Homer and Ned go into business together as bounty hunters, and Marge t..., Bart gets in trouble with Marge after she finds out that he has Denis ..., Bart trades lives with his multi-millionaire lookalike, but discovers ..., The Simpsons' 19th Halloween Special, with parodies of "Transformers,"..., The Simpsons take a Fourth of July vacation to a cabin hotel, which ca... (truncated)]
  - Column: air_date
    - Samples: [2008-09-28, 2008-10-05, 2008-10-19, 2008-11-02, 2008-11-09]
  - Column: episode_image
    - Samples: [https://m.media-amazon.com/images/M/MV5BMTYwMzk2Njg5N15BMl5BanBnXkFtZT..., https://m.media-amazon.com/images/M/MV5BMjMyNzU4ODMzN15BMl5BanBnXkFtZT..., https://m.media-amazon.com/images/M/MV5BMjA1ODM2ODkwM15BMl5BanBnXkFtZT..., https://m.media-amazon.com/images/M/MV5BMTgzOTYyNTc2OF5BMl5BanBnXkFtZT..., https://m.media-amazon.com/images/M/MV5BMjMxOTY4MjQzNl5BMl5BanBnXkFtZT... (truncated)]
  - Column: rating
    - Samples: [7.2, 7.0, 7.0, 7.1, 6.5]
  - Column: votes
    - Samples: [1192, 1055, 1015, 1190, 951]
- Table: Person
  - Column: name
    - Samples: [Marc Wilmore, Valentina Garza, J. Stewart Burns, Stephanie Gillis, Laurie Biernacki]
  - Column: birthdate
    - Samples: [1963-05-04, 1975-03-30, 1969-12-04, 1969-10-02, None]
  - Column: birth_name
    - Samples: [Marc Edward Wilmore, Valentina Lantigua, Joseph Stewart Burns, Stephanie Katina Gillis, Laurie D Templeton]
  - Column: birth_place
    - Samples: [None, USA, USA, USA, None]
  - Column: birth_region
    - Samples: [California, None, None, None, None]
  - Column: birth_country
    - Samples: [USA, None, None, None, None]
  - Column: height_meters
    - Samples: [None, None, None, None, None]
  - Column: nickname
    - Samples: [None, None, None, None, None]
- Table: Award
  - Column: award_id
    - Samples: [325, 326, 327, 328, 329]
  - Column: organization
    - Samples: [Primetime Emmy Awards, Primetime Emmy Awards, Primetime Emmy Awards, Primetime Emmy Awards, Primetime Emmy Awards]
  - Column: year
    - Samples: [2009, 2009, 2009, 2009, 2009]
  - Column: award_category
    - Samples: [Primetime Emmy, Primetime Emmy, Primetime Emmy, Primetime Emmy, Primetime Emmy]
  - Column: award
    - Samples: [Outstanding Voice-Over Performance, Outstanding Voice-Over Performance, Outstanding Voice-Over Performance, Outstanding Animated Program (For Programming Less Than One Hour), Outstanding Animated Program (For Programming Less Than One Hour)]
  - Column: person
    - Samples: [Dan Castellaneta, Hank Azaria, Harry Shearer, James L. Brooks, Matt Groening]
  - Column: role
    - Samples: [None, None, None, executive producer, executive producer]
  - Column: episode_id
    - Samples: [S20-E18, S20-E16, S20-E8, S20-E13, S20-E13]
  - Column: season
    - Samples: [None, None, None, None, None]
  - Column: song
    - Samples: [None, None, None, None, None]
  - Column: result
    - Samples: [Winner, Nominee, Nominee, Nominee, Nominee]
- Table: Character_Award
  - Column: award_id
    - Samples: [325, 326, 327, 327, 327]
  - Column: character
    - Samples: [Homer Simpson, Moe Szyslak, Kent Brockman, Lenny, Mr. Burns]
- Table: Credit
  - Column: episode_id
    - Samples: [S20-E10, S20-E13, S20-E14, S20-E4, S20-E19]
  - Column: category
    - Samples: [Casting Department, Casting Department, Casting Department, Animation Department, Animation Department]
  - Column: person
    - Samples: [Bonita Pietila, Bonita Pietila, Bonita Pietila, Adam Kuhlman, Adam Kuhlman]
  - Column: role
    - Samples: [casting, casting, casting, additional timer, additional timer]
  - Column: credited
    - Samples: [true, true, true, true, true]
- Table: Keyword
  - Column: episode_id
    - Samples: [S20-E1, S20-E1, S20-E1, S20-E1, S20-E1]
  - Column: keyword
    - Samples: [1930s to 2020s, erotic bakery, cake, bullet, st. patrick's day]
- Table: Vote
  - Column: episode_id
    - Samples: [S20-E1, S20-E1, S20-E1, S20-E1, S20-E1]
  - Column: stars
    - Samples: [2, 3, 4, 5, 1]
  - Column: votes
    - Samples: [16, 20, 36, 49, 67]
  - Column: percent
    - Samples: [1.3, 1.7, 3.0, 4.1, 5.6]

SELECT COUNT(award_id) FROM Award WHERE person = 'Ian Maxtone-Graham' AND organization = 'Writers Guild of America, USA' AND result = 'Nominee';