add citation

README.md

@@ -3,9 +3,9 @@ annotations_creators:
 - expert-generated
 language_creators:
 - expert-generated
-languages:
+language:
 - en
-licenses:
+license:
 - cc-by-4.0
 multilinguality:
 - monolingual
@@ -30,4 +30,16 @@ Negative Examples|199|62|68|345|
 Total|414|238|138|690|
 
 ## Citation 
-Coming soon. 
+@article{10.1093/database/baac048,  
+author = {Langnickel, Lisa and Darms, Johannes and Heldt, Katharina and Ducks, Denise and Fluck, Juliane},  
+title = "{Continuous development of the semantic search engine preVIEW: from COVID-19 to long COVID}",  
+journal = {Database},
+volume = {2022},
+year = {2022},
+month = {07},
+issn = {1758-0463},
+doi = {10.1093/database/baac048},
+url = {https://doi.org/10.1093/database/baac048},
+note = {baac048},
+eprint = {https://academic.oup.com/database/article-pdf/doi/10.1093/database/baac048/44371817/baac048.pdf},
+}