What was the GTP winning team in the round in Portland during which Jack Baldwin become part of the GTU winning team? 
{'header': ['Rnd', 'Circuit', 'GTP Winning Team', 'GTO Winning Team', 'GTU Winning Team', 'Results'], 'page_title': '', 'page_id': '', 'types': ['real', 'text', 'text', 'text', 'text', 'text'], 'id': '1-13643320-2', 'section_title': '', 'caption': '', 'rows': [['1', 'Daytona', '#00 Kreepy Krauly Racing', '#4 Stratagraph Inc.', '#76 Malibu Grand Prix', 'Results'], ['1', 'Daytona', 'Sarel van der Merwe Graham Duxbury Tony Martin', 'Terry Labonte Billy Hagan Gene Felton', 'Jack Baldwin Jim Cook Ira Young Bob Reed', 'Results'], ['2', 'Miami', '#04 Group 44', '#47 Dingman Bros. Racing', '#99 All American Racers', 'Results'], ['2', 'Miami', 'Doc Bundy Brian Redman', 'Walt Bohren', 'Chris Cord', 'Results'], ['3', 'Sebring', '#48 DeNarvaez Enterprises', '#4 Stratagraph Inc.', '#76 Malibu Grand Prix', 'Results'], ['3', 'Sebring', 'Mauricio DeNarvaez Hans Heyer Stefan Johansson', 'Terry Labonte Billy Hagan Gene Felton', 'Jack Baldwin Bob Reed Ira Young', 'Results'], ['4', 'Road Atlanta', '#16 Marty Hinze Racing', '#4 Stratagraph Inc.', '#76 Malibu Grand Prix', 'Results'], ['4', 'Road Atlanta', 'Don Whittington', 'Billy Hagan Gene Felton', 'Jack Baldwin Bob Reed', 'Results'], ['5', 'Riverside', '#56 Blue Thunder Racing', '#38 Mandeville Auto Tech', '#87 Performance Motorsports', 'Results'], ['5', 'Riverside', 'Don Whittington Randy Lanier', 'Roger Mandeville Amos Johnson', 'Elliot Forbes-Robinson John Schneider', 'Results'], ['6', 'Laguna Seca', '#56 Blue Thunder Racing', '#77 Brooks Racing', '#99 All American Racers', 'Results'], ['6', 'Laguna Seca', 'Randy Lanier', 'John Bauer', 'Jim Adams', 'Results'], ['7', 'Charlotte', '#56 Blue Thunder Racing', '#4 Stratagraph Inc.', '#99 All American Racers', 'Results'], ['7', 'Charlotte', 'Bill Whittington Randy Lanier', 'Billy Hagan Gene Felton', 'Chris Cord Jim Adams', 'Results'], ['8', 'Lime Rock', '#00 Kreepy Krauly Racing', '#38 Mandeville Auto Tech', '#76 Malibu Grand Prix', 'Results'], ['8', 'Lime Rock', 'Sarel van der Merwe', 'Roger Mandeville', 'Jack Baldwin', 'Results'], ['9', 'Mid-Ohio', '#14 Holbert Racing', '#91 Electrodyne', '#66 Mike Meyer Racing', 'Results'], ['9', 'Mid-Ohio', 'Al Holbert Derek Bell', 'Chester Vincentz Dave White', 'Jack Dunham Jeff Kline', 'Results'], ['10', 'Watkins Glen', '#14 Holbert Racing', '#91 Electrodyne', '#87 Performance Motorsports', 'Results'], ['10', 'Watkins Glen', 'Al Holbert Jim Adams Derek Bell', 'Chester Vincentz Jim Mullen', 'Elliot Forbes-Robinson John Schneider', 'Results'], ['11', 'Portland', '#56 Blue Thunder Racing', '#51 Corvette', '#76 Malibu Grand Prix', 'Results'], ['11', 'Portland', 'Bill Whittington Randy Lanier', 'David Schroeder Tom Hendrickson', 'Jack Baldwin', 'Results'], ['12', 'Sears Point', '#56 Blue Thunder Racing', '#77 Brooks Racing', '#98 All American Racers', 'Results'], ['12', 'Sears Point', 'Bill Whittington', 'John Bauer', 'Dennis Aase', 'Results'], ['13', 'Road America', '#14 Holbert Racing', '#91 Electrodyne', '#66 Mike Meyer Racing', 'Results'], ['13', 'Road America', 'Al Holbert Derek Bell', 'Chester Vincentz Jim Mullen', 'Jack Dunham Jeff Kline', 'Results'], ['14', 'Pocono', '#14 Holbert Racing', '#65 English Enterprises', '#87 Performance Motorsports', 'Results'], ['14', 'Pocono', 'Al Holbert Derek Bell', 'Gene Felton', 'Elliot Forbes-Robinson John Schneider', 'Results'], ['15', 'Michigan', '#56 Blue Thunder Racing', '#91 Electrodyne', '#84 Dole Racing', 'Results'], ['15', 'Michigan', 'Bill Whittington Randy Lanier', 'Chester Vincentz Jim Mullen', 'Clay Young', 'Results'], ['16', 'Watkins Glen', '#57 Blue Thunder Racing', '#91 Electrodyne', '#84 Dole Racing', 'Results'], ['16', 'Watkins Glen', 'Dale Whittington Randy Lanier', 'Chester Vincentz Jim Mullen', 'Clay Young', 'Results'], ['17', 'Daytona', '#14 Holbert Racing', '#67 Roush Racing', '#87 Performance Motorsports', 'Results']], 'name': 'table_13643320_2'}