Assertion: martin's work | /r/HasSubevent | national survey
Facets:
value: in 2015
type: TEMPORAL
value: in 2016
type: TEMPORAL
Source sentences:
text: During the summer of 2014 we tested methods for surveying House Martins and their breeding colonies on a larger scale and we hope that this work will lead to a national survey in 2015 and 2016.