Use of 'datas' is wrong. The word 'data' is used in both, singular and plural form.
show that the death rate has fallen down.
|Series, Species, Deer, Sheep, Fish, Cod, Yoke, Salmon, Salmon, Turbot, Pike, Mackerel|
Headquarters, Means, Score, Agenda, Data Apparatus, Swine, Rice, Heathen, Pan, Amends
|Incorrect:||A series of lectures were delivered.|
|Correct:||A series of seminar was delivered.|
|Incorrect:||The headquarter of the Army is in Delhi.|
|Correct:||The headquarters of the Army is in Delhi.|