EXHIBIT 1

(1) These shares are held directly by YF ART Holdings, L.P. ("YFA"). This Form 3
    is jointly filed by (i) YFA, (ii) YF ART Holdings GP, LLC ("YFA GP"), (iii)
    Yucaipa American Alliance Fund I, LP ("YAAF I"), (iv) Yucaipa American
    Alliance Fund I, LLC ("YAAF I LLC"), (v) Yucaipa American Funds, LLC
    ("Yucaipa American Funds"), (vi) Yucaipa American Management, LLC ("Yucaipa
    American" and, together with YFA, YFA GP, YAAF I, YAAF I LLC, and Yucaipa
    American Funds, the "Yucaipa Entities"), and (vii) Ronald W. Burkle. YFA GP
    is the general partner of YFA. YAAF I is the managing member of YFA GP. YAAF
    I LLC is the general partner of YAAF I. Yucaipa American Funds is the
    managing member of YAAF I LLC. Yucaipa American is the managing member of
    Yucaipa American Funds. Mr. Burkle is the managing member of Yucaipa
    American. Each of Mr. Burkle, YFA GP, YAAF I, YAAF I LLC, Yucaipa American
    Funds, and Yucaipa American, by virtue of their direct or indirect control
    of YFA, may be deemed to beneficially own some or all of the securities
    reported as being held by YFA. Each of the reporting persons hereunder
    disclaims beneficial ownership of the reported securities except to the
    extent of its or his pecuniary interest therein. This Form 3 shall not be
    deemed to be an admission that any reporting person hereunder is the
    beneficial owner of any of the reported securities for purposes of Section
    16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for
    any other purpose. CF Cold LP, a limited partner of YFA, is not controlled
    by Mr. Burkle and may file reports under Section 16 separately from Mr.
    Burkle and the Yucaipa Entities with respect to the securities reported
    herein.

(2) The common share warrants expire on the earliest to occur of (i) 5:00 p.m.
    New York time on January 31, 2019, (ii) the closing of a qualified sale
    transaction and (iii) the closing of a qualified initial public offering.