A group that provides mentors to poor students will honor a husband-and-wife lawyer duo for their commitment to its mission at a dinner Thursday night.Lawyers Lend-A-Hand to Youth is holding its annual spring awards dinner and marking its 20th anniversary.At the dinner, Kimball R. Anderson, a Winston & Strawn LLP partner, and his wife, Karen Gatsis Anderson, will receive the group’s Abraham Lincoln Marovitz Philanthropic Award.The couple is being recognized because they’re “committed to our mission of …