LIMITED POWER OF ATTORNEY

	The undersigned, Ming Lu, hereby constitutes and appoints each of
Alan K. Tse, Gordon G. Repp and Mackenzie K. Phillips, signing singly, as
his true and lawful attorney-in-fact for the limited purposes of:

(1) prepare, execute in such person?s name and on such person?s behalf, and
submit to the United States Securities and Exchange Commission (the ?SEC?) a
Form ID, including amendments thereto, and any other documents necessary or
appropriate to obtain codes, passwords, and passphrases enabling such person
to make electronic filings with the SEC of reports required by Section 16(a)
or Section 13 of the Securities Exchange Act of 1934, as amended (the ?Exchange
 Act?), or any rule or regulation of the SEC;

(2) executing for and on behalf of the undersigned Forms 3, 4 and 5 in
accordance with Section 16(a) of the Exchange Act, and the rules thereunder;

(3) doing and performing any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete the execution of any such Form
3, 4 or 5 and the timely filing of such form with the SEC and any other
authority; and

(4) taking any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit
to, in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of
the undersigned pursuant to this Limited Power of Attorney shall be in such
form and shall contain such terms and conditions as such attorney-in-fact may
approve in his or her discretion.

	The powers granted above may be exercised by each such attorney-in-fact on
behalf of the undersigned, individually, and on behalf of the undersigned in
the undersigned?s fiduciary and representative capacity in which the
undersigned may be acting.

	The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform all and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and
powers herein granted, as fully to all intents and purposes as such attorney-
in-fact might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or his substitute or substitutes, shall lawfully do or cause
to be done by virtue of this Limited Power of Attorney and the rights and
powers herein granted.  The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned?s responsibilities to
comply with Section 16 of the Exchange Act.

	This Limited Power of Attorney shall be effective on the date set forth below
and shall continue in full force and effect until the date on which the
undersigned shall cease to be subject to Section 16 of the Exchange Act and
the rules thereunder or until such earlier date on which written notification
executed by the undersigned is filed with the SEC expressly revoking this
Limited Power of Attorney.

	IN WITNESS WHEREOF, the undersigned has caused this Limited Power of Attorney
to be executed as of this 1st day of May 2019.


       						/s/ Ming Lu