user: Question: What was the SlNo no of contact person SDE (P), Thiruppattur?
Columns: ['SlNo', 'Name of the City', 'Address', 'Contact Person', 'Telephone No', 'Facilities Offered']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2.0, 'Paramakudi', 'MBM Exchange,Balan nagar, Paramakudi-2.', 'SDOP,Paramakudi', '04564 - 223225 /223333', 'CAT-II']
SQL:

assistant: SELECT "SlNo" FROM "Table" WHERE "Contact Person" = 'SDE (P), Thiruppattur';