Database: tracking_share_transactions
Question: What are the lot details of lots associated with transactions whose share count is bigger than 100 and whose type code is "PUR"?
SQL: select t1.lot_details from lots as t1 join transactions_lots as t2 on  t1.lot_id  =  t2.transaction_id join transactions as t3 on t2.transaction_id  =  t3.transaction_id where t3.share_count  >  100 and t3.transaction_type_code  =  "pur"