How many couples won the Mixed Doubles in 1997?
{'header': ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles'], 'page_title': 'Israeli National Badminton Championships', 'section_title': 'Past winners', 'caption': 'Past winners', 'rows': [['1977', 'Victor Yusim', 'Chaya Grunstein', 'Victor Yusim Michael Schneidman', 'Vivian Meirowitz Carol Silman', 'Michael Schneidman Dianne Levi'], ['1978', 'Nissim Duk', 'Chaya Grunstein', 'Victor Yusim Michael Schneidman', 'Carol Silman Prina Ben Shushan', 'Michael Rappaport Gila Rappaport'], ['1979', 'Yitzhak Serrouya', 'Eva Unglick', 'Victor Yusim Michael Schneidman', 'no competition', 'Michael Rappaport Eva Unglick'], ['1980', 'Yitzhak Serrouya', 'Eva Unglick', 'Nissim Duk Yitzhak Serrouya', 'Eva Unglick Irit Ben Shushan', 'Michael Rappaport Eva Unglick'], ['1981', 'Nissim Duk', 'Eva Unglick', 'Victor Yusim Michael Rappaport', 'Eva Unglick Irit Ben Shushan', 'Michael Rappaport Eva Unglick'], ['1982', 'Nissim Duk', 'Aliza Moses', 'Nissim Duk Yitzhak Serrouya', 'Aliza Moses Bruria Serrouya', 'Yitzhak Serrouya Aliza Moses'], ['1983', 'Nissim Duk', 'Aliza Moses', 'Nissim Duk Yitzhak Serrouya', 'Aliza Moses Bruria Serrouya', 'Yitzhak Serrouya Aliza Moses'], ['1984', 'Nissim Duk', 'Irit Ben-Shushan', 'Nissim Duk Reuven Moses', 'Aliza Moses Bruria Serrouya', 'Reuven Moses Irit Ben Shushan'], ['1985', 'Reuven Moses', 'Bruria Serrouya', 'Reuven Moses Victor Yusim', 'no competition', 'Reuven Moses Aliza Moses'], ['1986', 'Reuven Moses', 'Bruria Serrouya', 'Reuven Moses Amir Moses', 'no competition', 'no competition'], ['1987', 'Amir Moses', 'Sigalit Moses', 'Reuven Moses Amir Moses', 'no competition', 'Amir Moses Sigalit Moses'], ['1988', 'Reuven Moses', 'Shirley Daniel', 'Reuven Moses Amir Moses', 'no competition', 'Reuven Moses Aliza Moses'], ['1989', 'Amir Moses', 'Shirley Daniel', 'Reuven Moses Amir Moses', 'no competition', 'Reuven Moses Bruria Serrouya'], ['1990', 'Reuven Moses', 'Natalia Sverdlin', 'Reuven Moses Amir Moses', 'no competition', 'Reuven Moses Natalia Sverdlin'], ['1991', 'Reuven Moses', 'Svetlana Zilberman', 'Reuven Moses Amir Moses', 'Svetlana Zilberman Maybar Ben Ari', 'Leonid Paikin Svetlana Zilberman'], ['1992', 'Amir Moses', 'Svetlana Zilberman', 'Reuven Moses Amir Moses', 'Svetlana Zilberman Sigalit Moses', 'Reuven Moses Svetlana Zilberman'], ['1993', 'Amir Moses', 'Sigalit Moses', 'Reuven Moses Amir Moses', 'Sigalit Moses Anat Ladsky', 'Leonid Paikin Natalia Sverdlin'], ['1994', 'Amir Moses', 'Svetlana Zilberman', 'Reuven Moses Amir Moses', 'Svetlana Zilberman Esther Koifman', 'Reuven Moses Svetlana Zilberman'], ['1995', 'Leon Pugatch', 'Svetlana Zilberman', 'Reuven Moses Amir Moses', 'Svetlana Zilberman Sigalit Moses', 'Reuven Moses Svetlana Zilberman'], ['1996', 'Leon Pugatch', 'Svetlana Zilberman', 'Leon Pugatch Meni Gershon', 'Svetlana Zilberman Esther Koifman', 'Reuven Moses Svetlana Zilberman'], ['1997', 'Leon Pugatch', 'Svetlana Zilberman', 'Leon Pugatch Eli Raymond', 'Svetlana Zilberman Shirley Daniel', 'Leon Pugatch Svetlana Zilberman'], ['1998', 'Paz Ben-Sira', 'Svetlana Zilberman', 'Leon Pugatch Eli Raymond', 'Svetlana Zilberman Shirley Daniel', 'Leon Pugatch Svetlana Zilberman'], ['1999', 'Leon Pugatch', 'Svetlana Zilberman', 'Leon Pugatch Eli Raymond', 'Svetlana Zilberman Shirley Daniel', 'Leon Pugatch Svetlana Zilberman'], ['2000', 'Leon Pugatch', 'Svetlana Zilberman', 'Nir Yusim Boris Kroiter', 'Svetlana Zilberman Shirley Daniel', 'Leon Pugatch Svetlana Zilberman'], ['2001', 'Nir Yusim', 'Svetlana Zilberman', 'Nir Yusim Boris Kroiter', 'Svetlana Zilberman Svetlana Kaplian', 'Leon Pugatch Svetlana Zilberman'], ['2002', 'Shai Geffen', 'Svetlana Zilberman', 'Leon Pugatch Dani Schneidman', 'Svetlana Zilberman Svetlana Kaplian', 'Sergey Antonyuk Svetlana Zilberman'], ['2003', 'Shai Geffen', 'Svetlana Zilberman', 'Nir Yusim Boris Kroitor', 'Svetlana Zilberman Svetlana Kaplian', 'Sergey Antonyuk Svetlana Zilberman'], ['2004', 'Nir Yusim', 'Svetlana Zilberman', 'Reuven Moses Amir Moses', 'Svetlana Zilberman Svetlana Kaplian', 'Sergey Antonyuk Svetlana Zilberman'], ['2005', 'Shai Geffen', 'Svetlana Zilberman', 'Nir Yusim Boris Kroitor', 'Svetlana Zilberman Svetlana Kaplian', 'Misha Zilberman Svetlana Zilberman'], ['2006', 'Misha Zilberman', 'Svetlana Zilberman', 'Nir Yusim Alex Bass', 'no competition', 'Misha Zilberman Svetlana Zilberman']]}