Remove the spaces from the following sentence: The database contains a great number of science articles of high standard, freely accessible to anyone. However, once in a while articles pop up which are on the borderline of normal scientific standards.
Thedatabasecontainsagreatnumberofsciencearticlesofhighstandard,freelyaccessibletoanyone.However,onceinawhilearticlespopupwhichareontheborderlineofnormalscientificstandards.