[tag=NN] [tag=IN] [□=□] □ □
[tag=NN] [tag=IN] [tag=□] □ □
[tag=NN] [tag=IN] [lemma=□] □ □
Illegal clandestine support for the contras became more difficult after the partial exposures during the Iran-contra affair , and it was no longer possible to organize overt congressional support for the contras at the extraordinary level required to keep them in the field . Reliable homological alignment of these proteins became possible with turtle sequence along with prediction of beta sheet and alpha helices . " Mature buttonwood is so hard and dense it does not rot in the hot , wet South Florida climate , and so the dried-out trees remain , dotting what in the aftermath of those storms became a low-lying prairie of cactuses and other succulents growing precariously from salty ground and inundated for much of the rainy season . Enforcement of these rules becomes everyone 's responsibility , and often group pressure suffices to curb the difficult person . If the grain-size of the materials becomes close to this length , then the properties within the grain vary significantly from the properties of the bulk .