source: [word=proved] [tag=□] □
destination: [word=proved] [tag=IN] □
spec: The French have , for instance , in the case of the stem cells , offered or said , `` Why should there not be a common stem cell bank for Europe ? This eliminates duplicated work and bundle naming , structuring and versioning variations . That this position is , however , dangerous , is proved by recent events . The new procedure however , is conducted solely through four tubes inserted into the abdomen at the sides and just below or in the navel , thus resulting in four smaller incisions that drastically reduce the amount of visible scarring . According to this , it is now possible to carry out such tests when family ties cannot be proved by other means . The likelihood of regaining useful sight is generally good , with some estimates placing it as high as 95 % , although complications may prevent successful treatment in some cases . The workers proved during many harvests - - coffee , sugarcane , and many others - - that agricultural production by hectare could be considerably increased .