Translate the following question to SQL: What is the the phone number of Nancy Edwards?

Schema: CREATE TABLE artists (
    id INTEGER   PRIMARY KEY,
    name VARCHAR(120),
    UNIQUE (id)
);

CREATE TABLE sqlite_sequence (
    name,
    seq
);

CREATE TABLE albums (
    id INTEGER   PRIMARY KEY,
    title VARCHAR(160) NOT NULL,
    artist_id INTEGER NOT NULL,
    UNIQUE (id),
    FOREIGN KEY (artist_id) REFERENCES artists(id)
);

CREATE TABLE employees (
    id INTEGER   PRIMARY KEY,
    last_name VARCHAR(20) NOT NULL,
    first_name VARCHAR(20) NOT NULL,
    title VARCHAR(30),
    reports_to INTEGER,
    birth_date TIMESTAMP,
    hire_date TIMESTAMP,
    address VARCHAR(70),
    city VARCHAR(40),
    state VARCHAR(40),
    country VARCHAR(40),
    postal_code VARCHAR(10),
    phone VARCHAR(24),
    fax VARCHAR(24),
    email VARCHAR(60),
    UNIQUE (id),
    FOREIGN KEY (reports_to) REFERENCES employees(id)
);

CREATE TABLE customers (
    id INTEGER   PRIMARY KEY,
    first_name VARCHAR(40) NOT NULL,
    last_name VARCHAR(20) NOT NULL,
    company VARCHAR(80),
    address VARCHAR(70),
    city VARCHAR(40),
    state VARCHAR(40),
    country VARCHAR(40),
    postal_code VARCHAR(10),
    phone VARCHAR(24),
    fax VARCHAR(24),
    email VARCHAR(60) NOT NULL,
    support_rep_id INTEGER,
    UNIQUE (id),
    FOREIGN KEY (support_rep_id) REFERENCES employees(id)
);

CREATE TABLE genres (
    id INTEGER   PRIMARY KEY,
    name VARCHAR(120),
    UNIQUE (id)
);

CREATE TABLE invoices (
    id INTEGER   PRIMARY KEY,
    customer_id INTEGER NOT NULL,
    invoice_date TIMESTAMP NOT NULL,
    billing_address VARCHAR(70),
    billing_city VARCHAR(40),
    billing_state VARCHAR(40),
    billing_country VARCHAR(40),
    billing_postal_code VARCHAR(10),
    total NUMERIC(10,2) NOT NULL,
    UNIQUE (id),
    FOREIGN KEY (customer_id) REFERENCES customers(id)
);

CREATE TABLE media_types (
    id INTEGER   PRIMARY KEY,
    name VARCHAR(120),
    UNIQUE (id)
);

CREATE TABLE tracks (
    id INTEGER   PRIMARY KEY,
    name VARCHAR(200) NOT NULL,
    album_id INTEGER,
    media_type_id INTEGER NOT NULL,
    genre_id INTEGER,
    composer VARCHAR(220),
    milliseconds INTEGER NOT NULL,
    bytes INTEGER,
    unit_price NUMERIC(10,2) NOT NULL,
    UNIQUE (id),
    FOREIGN KEY (media_type_id) REFERENCES media_types(id),
    FOREIGN KEY (genre_id) REFERENCES genres(id),
    FOREIGN KEY (album_id) REFERENCES albums(id)
);

CREATE TABLE invoice_lines (
    id INTEGER   PRIMARY KEY,
    invoice_id INTEGER NOT NULL,
    track_id INTEGER NOT NULL,
    unit_price NUMERIC(10,2) NOT NULL,
    quantity INTEGER NOT NULL,
    UNIQUE (id),
    FOREIGN KEY (track_id) REFERENCES tracks(id),
    FOREIGN KEY (invoice_id) REFERENCES invoices(id)
);

CREATE TABLE playlists (
    id INTEGER   PRIMARY KEY,
    name VARCHAR(120),
    UNIQUE (id)
);

CREATE TABLE playlist_tracks (
    playlist_id INTEGER NOT NULL  PRIMARY KEY,
    track_id INTEGER NOT NULL  PRIMARY KEY,
    PRIMARY KEY (playlist_id, track_id),
    UNIQUE (playlist_id, track_id),
    UNIQUE (playlist_id, track_id),
    FOREIGN KEY (track_id) REFERENCES tracks(id),
    FOREIGN KEY (playlist_id) REFERENCES playlists(id)
);
user
SELECT phone FROM employees WHERE first_name = "Nancy" AND last_name = "Edwards";
assistant