How many flights are arriving in Washington DC today? | Sorry, what is the date you meant by today? | I am sorry I meant on April/12/2005
SELECT count ( * )  FROM Flight where destination  =  "Washington D.C." and arrival_date Like "%04/12/2005%"
arriving in Washington DC refers to destination = 'Washington D.C.'; today refers to a specific date, in this case, '04/12/2005'; count of flights refers to COUNT(*);