งานนี้จัดขึ้นที่ลอสแอนเจลิสกี่ปี ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
What is the number of years that the event was foil team and took place in Los Angeles?It is not neccessary to use all the tables.
 table_name_77:  (year [ VARCHAR ] venue [ VARCHAR ] event [ VARCHAR) ]
SELECT COUNT(year) FROM table_name_77 WHERE venue = "los angeles" AND event = "foil team"